Essay about Teen Pregnancy Prevention - 1164 Words

Many methods can be used to prevent teenage pregnancy and can decrease the birthrate significantly. Doctors and parents play a key role in teen pregnancy preventions. Since teen birthrates are rising, teens have to have access to preventions in order for it to be effective. With having permission from a guardian to engage in preventions, children can prevent themselves from becoming a parent at such a young age. Parents should properly inform their child on the subject of sex and communicate with them daily to figure out if further methods should be considered. The most common and effective type of prevention is contraceptive use. Adolescents have to learn about these contraceptives to prevent pregnancy and this is where sex education†¦show more content†¦Prevention programs can introduce adolescents to what it takes to be a parent and can provide them with the knowledge to prevent pregnancy. According to Saunder, â€Å"Pregnancy prevention programs can help teens become m ore skilled, and increase their confidence in those skills, in using contraception effectively and in negotiating abstinence or the use of contraception with their partner. Programs can also help participants to identify risky situations and effective ways to avoid those situations† (Saunder). Programs based on teenage pregnancy prevention help develop a better and more advanced understanding on how to avoid consequences that are life changing. In order to avoid situations that lead to pregnancy and for prevention methods to be effective, sex education needs to be considered. Comprehensive sex education equips teens with the knowledge to perform safe sexual practices. This method requires a special teacher that can easily get through to an adolescent that is willing to take advice. According to Stanger-Hall, â€Å"An important first step towards lowering the high teen pregnancy rates would be states requiring that comprehensive sex education (with abstinence as a desired behavior) is taught in all public schools. Another important step would involve specialized teacher training† (Stanger-Hall). Teen pregnancies decline from the help of teachers specialized in the particular subject of teenShow MoreRelatedThe Prevention of Teen Pregnancy1638 Words   |  7 PagesTopic: Prevention of Teen Pregnancy Specific Purpose: To persuade others to help prevent teen pregnancy. Thesis Statement: Teen pregnancy is one of the most difficult experiences a young woman passes through. The stress of pregnancy, revealing of the pregnancy to parents, and moving on despite the shame and worry can be terrifying. Some may say they did not use protection because they werent planning to have sex. These kinds of life altering choices must be considered in advance in order to preventRead MoreTEEN PREGNANCY PREVENTION Essay1918 Words   |  8 PagesTeen pregnancy has become an epidemic in the United States alone. The United States has the highest rate of teen pregnancy and sexually transmitted infections (STIs) in the industrialized world. Each year, one out of three teenage girls becomes pregnant. Although teen pregnancy rates have dropped from 61.8 births per 1,000 in 1991 to 41.7 births per 1,000 in 2003, pregnancy rates in the U.S. still are declining at slower rates than those in other developed nations (Block et al., 2005. para,Read MoreEssay Teen Pregnancy Prevention2313 Words   |  10 Pages The rise of the teen pregnancy rate has caused us to question the effectiveness of the prevention programs that are offered to adolescents. There have been several programs focused on preventing teen pregnancy from abstinence-only to more comprehensive sexual education programs. Abstinent-only advocates believe that abstaining from having intercourse is the only way to prevent unwanted teen pregnancy. While practicing abstinence is the only 100% secure method of reducing this rateRead MoreAssessment of Teen Pregnancy Prevention Interventions648 Words   |  3 PagesAssessment of Teen Pregnancy Prevention Interventions How is the literature review used in this research study? Using one (1) previous study cited by the authors, discuss how the findings of this past study is relevant to the current study. (2 pts) The literature review in this study was used to demonstrate the problem and occurrence of adolescent pregnancy and birth rates in the United States. Furthermore, the concern about this phenomenon as it pertains to Florida is addressed. A correlationRead MoreTeen Pregnancy Problems and Prevention Strategies2068 Words   |  8 Pagesï » ¿Teen Pregnancy problems and prevention strategies While many people are inclined to express indifference regarding this concept, teen pregnancy is one of the most controversial topics in the contemporary society. This experience can be devastating for some individuals, as the fact that they are raw makes it difficult for them to effectively deal with the problem. Society becomes more stressing and most teens who become pregnant come to express feelings related to shame and fear. The fact that theseRead MoreTeenage Pregnancy : A High Risk, The Effects, And The Prevention Of Teen Pregnancy1242 Words   |  5 PagesTeenage pregnancy is a huge problem in the United States, but the rates are not at an all-time high. The pregnancy rates of teens have actually gone down in the past few years, but it still is a big problem here in the United States. The United States has the highest rate of teenage pregnancy, Russia has the second highest. Teenage pregnancy is a social and economic problem; it is not good for our country. This essay, will discuss who is at a high risk, the effects, and the prevention of teen pregnancyRead MoreTeen Pregnancy Prevention : One Of The Most Controversial Subjects875 Words   |  4 PagesPreventing Teen Pregnancy Teen pregnancy prevention is one of the most controversial subjects in today’s society. Many will argue that peer pressure and the area you live in are contributing factors to most adolescent pregnancies. No matter what geographic location you reside in, the problem is usually in the home, in the school system, and the cost of contraception and the barriers in obtaining it. The biggest predicament regarding the issue of adolescent pregnancy is the question of prevention. PreventingRead MoreEssay on The PPACA: Obesity and Teen Pregnancy Prevention Programs1106 Words   |  5 Pages2009, p.1314). In fact, more than 60% of teens who give birth before the age of 18 will drop out of high school, putting them at a greater risk of being impoverished later in life (Harris Allgood, 2009, p.1314). Additionally, the children of adolescent mothers are more likely to have complicated deliveries that can lead to chronic medical and developmental problems (Harris Allgood, 2009, p.1315). With higher rates of poverty as well as increased pregnancy complications, many teenage mothers mayRead MoreEvaluation Of Sex Education School On Teen Pregnancy Prevention3109 Words   |  13 Pages Research Proposal Evaluation of Sex Education in School on Teen Pregnancy Prevention Megan R. Fitzgerald PSY 290 – Research Methods Gayle Schwark, Ph.D. Arizona State University November 27, 2014 Abstract This study is proposed in order to evaluate the various types of school-based sex education programs and the effect that these specific programs have on teen pregnancy rates. The type of approaches for school-based sex education programs offered to the teenage participants will beRead MoreTeen Pregnancy and High School Drop Out Prevention3722 Words   |  15 PagesTeenage pregnancy is affecting the graduation rate in high schools. All over the nation the dropout rate of students is increasing, of which teen pregnancy is often a factor. â€Å"Approximately 1,000 high school students will drop out with each hour that passes in a school day in America. This means that 30 percent of the class of 2007, or 1.2 million students, were estimated to have dropped out last year† (National Womens Law Center, 2007). Many factors combine to affect a pregnant or parenting teen’s

English Writing Assessment Free Essays

The deep freeze left roads and pavements covered in ice, making driving and conditions for pedestrians extremely dangerous. Salt supplies are ‘stretched’, while thousands of schools are shut and air and rail travel are again affected y delays. In Hartley, Essex and Leeds, officials have decided to only grit key routes, leaving many roads untreated. We will write a custom essay sample on English Writing Assessment or any similar topic only for you Order Now Motorway hard shoulders are no longer being gritted, with the government proportioning salt for the worst- affected regions. There have even been reports of some local councils removing grit bins in certain areas in an attempt to reduce salt usage. Milk deliveries have also been disrupted, with tankers struggling to reach dairy farms. Some farmers have had to dump supplies as few have large storage facilities while, in Scotland, several barn roofs have collapsed under the weight of snow. In Bristol Harbor, the temperature was low enough that the sea began to freeze over. Conditions have been so poor in places that some villages have been cut off, including Princeton in Dartmouth. Up to 4,000 homes were without water after a main burst outside the Royal Berkshire Hospital in Reading. Thousands of schools remain closed, with exam candidates in England, Wales and Northern Ireland warned they could have to wait five months to sit GEESE and A-level modules if weather prevents them taking them next week. Overnight, temperatures in Manchester fell to -ICC, with Glasgow reaching ICC, Cardiff -ICC and London hovering just below zero. The lowest temperature recorded this week was in the Scottish Highlands, -22. ICC while England’s low was -ICC in Woodward, Cheshire. Temperatures are expected to stay around freezing throughout the weekend and forecasters say winds could make it feel even colder. Page 2 of 4 Document 2 – Extract from online forums Suffolk County Council Website Discussion Forum Mike D am furious about the school closures in my area. Wave had 3-4 inches of snow and yet local schools only a mile apart have made different decisions about whether to open or close. The Government should carry out an urgent review of school closure policies. It is absolutely outrageous that teachers are still being paid when they are failing to do their job. Anonymous am a Secondary School Teacher in a school of 1,300 pupils. Unfortunately, when the weather is like it is now, school closures are a necessity. It isn’t simply a matter of whether the teaching staff can get to the school or not (though that is a factor), but also how safe it is for them when they get there. Obviously, the same applies for the pupils too, many of whom do not attend he school nearest to them and would be traveling early morning when the roads are at their most dangerous. Not to mention the fact that we’re at the mercy of the bus services on top of all this. In fact, only the other day I saw a bus struggling to get up a hill because the road hadn’t been gritted. The fact is that its often more sensible to close the school altogether than to risk teaching a small number of pupils in potentially unsafe conditions. Sarah P My children were at home for two days in the week as their school was closed because of the snow. We had a fantastic time making a snowman, sledging ND having a snowball fight in the park. We don’t see weather like this very often; can’t we let the kids enjoy it a little bit? My husband has had no real problems getting to work, and I’ve been walking to the local shops to get our food shopping. Apart from the fact that I’ve been forced to take annual leave to look after the children, is this weather really all that bad? Michelle M A lot of people seem to be complaining about school closures and teachers not being in work. Let’s be honest; the vast majority of you would happily take a ‘snow day’ if it was offered to you. I know I would! Having said that, the dads around my way haven’t been gritted and I’ve already seen one accident where a driver lost control and skidded into a parked car. My kids’ school has been closed for a few days now and my youngest has missed some Of his exams, which he’s been working really hard for, but to be perfectly honest, the break has done him good. Page 3 of 4 @ Education Development International ply 201 0 TASK 1 You live on a road that is a main bus route to the local secondary school. During the cold weather, your road did not get gritted. Write a letter to the council persuading them that your road needs to be made a priority road for rioting. How to cite English Writing Assessment, Papers

Understanding Language and Literacy Talking and Listening

Question: Discuss about theUnderstanding Language and Literacy for Talking and Listening. Answer: Using a Book as a Learning Source to Promote Language and Literacy for Children from Diverse Cultural Background and Home Language Literacy for children in ECDE entails talking, listening, visual literacies like viewing and drawing, and critical thinking among children in their formative ages. Today with the emerging new trends aggravated by the emergent of technology has broadened the literacies for children to include; literacies for technology such as computer games, internet searches, faxes and emails. Other forms of literacies include the literacy of popular culture which includes movies, theatre and arts. Equally important to the development and learning of children is the functional literacy which includes road maps, timetable among other drawings and ecological literacy mostly taught to indigenous groups such as the Aborigines of Australia (Ball, 2007). To support language and literacy for children from diverse cultural backgrounds and home languages, teachers in Australia employ the use of various teaching resources. Key among the teaching sources being cultural connection booklets. The content of the booklets introduce the various materials contained in the varied cultural connections. This helps children learn and engage in some of the major topics that surround essential issues such as respect of diversity and cultural competency in the ECDE sector. As a result, children who attend the ECDE program together with their families are able to feel welcomed, enriched and settled and in the end grow and flourish in the Australian multicultural society (McCarty, etal, 2004). The booklet contains various practical examples, stories, reflective questions, exercises as well as the ideas explaining how the children should use the booklet in a more meaningful way. It contains materials that encourage children to adhere to their cultural traditions and empower them to participate in cultural activities as this serves to enhance their wellbeing making them resilient, have self-confidence and feel protected from prolonged isolation, emotional trauma and a feeling of exclusion. The booklet contains learning materials that acknowledges and incorporates the childrens diverse cultures, diverse languages, varied beliefs and the diverse family and community values. By using the booklet, the children are equipped with the literacy skills to help them recognise their own distinct worldview and to be able to build their self-competencies that enable them to interact within cultures of the larger Australian society. The booklet is designed in a manner to help impart essential values into children (Janus, 2007). For instance, the topics, language, activities, materials and displays are presented in a manner that helps to support language and literacy for children from diverse cultural background and home language. Aims to be achieved by using Booklet as the learning source Guiding Children to Respect Diversity The booklet contains culturally relevant materials that teach children to respect, appreciate, positively interact with people from diverse backgrounds and abhor bias activities and stand up for themselves and for their fellow children facing discrimination in society. This helps children appreciate the reality of social challenges in the society they live in such as discrimination, cultural prejudice and multiculturalism (Ball, etal, 2004). Moreover, the booklet addresses questions that appear discriminatory, it provides honest answers and avoids using complicated language, gives examples of cases of exclusion and how they were addressed and provides examples that the children can easily relate to on issues encouraging them to think through the consequences of discrimination. The booklet should also present pictures and drawings that appreciate varied skin colour and enable the children to embrace and appreciate all skin colours as being beautiful and special in all rights. Helps Children Understand their own Racism and Personal Prejudices The booklet presents cases that deter the various forms of racism and racist attitudes that in many ways manifest in innocent children such as stereotyping and xenophobia. The booklet engages children in conservations that are aimed at ending racism and xenophobia against minority groups (Langer, 1995). Helps Children Learn how to Communicate with Others from Diverse Backgrounds The booklet imparts in children cross-cultural communication skills through its contents which put more emphasis on the children connecting with their fellows on a human level. They are encouraged to share information on family, personal experiences, diverse cultures and in the process learn to accept and appreciate other peoples cultures. The children will also learn to appreciate other forms of communication employed by those from diverse culture such as non-verbal communication cues (Jalongo, 2000). How the Booklet acknowledges the importance of cultural diversity and home language for the childrens literacy learning and teaching and how it will be used to support cultural diversity and the home language; The booklet will have contents that teach children to ignore prejudice and discrimination against members of other cultures. They are taught and encouraged to build relationships across cultures and to use their home languages in learning. Children are encouraged to think critically on issues such as cultural diversity and the varied home language. This is done by highlighting examples from various cultural settings portrayed by various examples that the booklet presents to the children. Through the content of the booklet, they are encouraged to think and feel independently in their own cultures and home language (Lindfors, 1999). Children are taught to see the society in a bigger picture. This is done by making links between their own experiences and between varied types of prejudices and discrimination. This enables them make links between their lives and the lives of the other people around them. The booklet imparts confidence in children and enables them develop conscience and literacy skills to broaden their understanding on social issues such as discrimination and prejudice. They are encouraged to do presentations in their own cultures and using their home languages. Examples of Learning Activities used with the Children In cases where a child feels shy to speak and read the book in the classroom, the teacher can crouch down to make the child feel respected and appreciated. Moreover, the teacher may impart confidence in the shy kids by clapping for them even when they make mistakes, rewarding them and putting the children in groups to enable them get used to speaking before others. The teacher should ask children to bring their own set of experiences and ideas to the lesson, regardless of the subject matter of the lesson. This enhances creativity and cultural diversity as the children are able to learn and appreciate experiences from other cultures. This also promotes the home language as the kids are allowed to share the experiences in their home language. The teacher should assess what the children know through dialogue. This makes children feel welcomed and have a sense of belonging as they are able to dialogue on their own ideas and express their knowledge in the home language and in their own cultures. References Langer, J. A. (1995). Envisioning Literature: Literary Understanding and Literature Instruction. Language and Literacy Series. International Reading Association, 800 Barksdale Road, PO Box 8139, Newark, DE 19714-8139 (Book No. 159 paperback: ISBN-0-8077-3464-0, $14.95 members, $17.95 nonmembers; cloth: ISBN-0-8077-3465-9).. Lindfors, J. W. (1999). Children's Inquiry: Using Language To Make Sense of the World. Language and Literacy Series. Teachers College Press, PO Box 20, Williston, VT 05495-0020 (paperback: ISBN-0-8077-3836-0, $24.95; clothbound: ISBN-0-8077-3837-9, $53). Jalongo, M. R. (2000). Early childhood language arts: Meeting diverse literacy needs through collaboration with families and professionals. Allyn and Bacon, 160 Gould St., Needham Heights, MA 02494. McCarty, T. L., Watahomigie, L. J., thi Dien, T., Perez, B. (Eds.). (2004). Sociocultural contexts of language and literacy. Taylor Francis. Ball, J. (2007). Aboriginal young childrens language and literacy development: Research evaluating progress, promising practices, and needs. Canadian Language and Literacy Networked Centre of Excellence. Available online at: https://www. ecdip. org/docs/pdf/CLLRNet% 20Feb, 202008. Ball, J., Lewis, M., Peltier, S. (2004). Culturally appropriate practices for facilitating early language development of Indigenous children. In Annual Conference of the Canadian Association of Speech-Language Pathologists and Audiologists, Ottawa. Retrieved July (Vol. 13, p. 2009). Cummins, J. (1994). Knowledge, power, and identity in teaching English as a second language. Educating second language children: The whole child, the whole curriculum, the whole community, 33-58. Janus, M. (2007). The Early Development Instrument: A tool for monitoring childrens development and readiness for school. Early Child Development-From Measurement to Action. A Priority for Growth and Equity, 141-155.

The heat given out by different types of primary alcohols Essay Example

The heat given out by different types of primary alcohols Essay In my investigation I will measure the heat given out by different types of primary alcohols when combusting with oxygen and compare the difference in the energy out put per mole of different alcohols.HypothesesBefore we can have a look at the heat content of the different alcohols, we must be able to understand the process of combustion, the changes of the energy within the system while combusting with oxygen and how to determine the difference of the energy given out per unit.First it is crucial to know that it is the external energy that we are measuring of the system, because as the Second Law of thermodynamics states that heat cannot be completely converted into work without some part of the system undergoing change, a equation is applied to the law illustrates that H (total heat content) = G (free energy) + TS (temperatureà ¯Ã‚ ¿Ã‚ ½entropy, TS is the unfree energy which is associated with the degree of disorder of the system), and H can only be equal to G when TS=0 which only takes place at the temperature of absolute zero.We therefore cannot measure the total change in enthalpy (total heat content) since the 3rd law of thermodynamics states that absolute zero cannot be reached; the entropy which measures the degree of disorder also increases spontaneously that the particles of the system become disorderer or more random. What this investigation measures is the spontaneous change in the free energy which is converted into heat as stated in the second law of thermodynamics.Then it is necessary to know that the reaction is exothermic that is heat or in another word kinetic energy and light energy, which is the emission given out when the exited electron return to a lower energy levels, are given out to the surroundings causing the surroundings to gain more kinetic energy and rise in temperature. We can measure the different values of the bond energy of the reactants and the variation between the two values, if the value of variation is positive i.e. when energy is gained the reaction is endothermic, but if the value appears to be negative, then the reaction is exothermic. It is possible to calculate the average bond energy measured in kilo joules per mole (DH/KJ mol-1) and determine the variation. Knowing that C-H=413; C-O=336; C==O=805; H-O=464; O==O=498.3 and the following equation it is possible to calculate ?E.2CH3 (OH) +3O2= 2CO2 +4H2O(413à ¯Ã‚ ¿Ã‚ ½3+336+464)à ¯Ã‚ ¿Ã‚ ½2+498.3à ¯Ã‚ ¿Ã‚ ½3-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½2-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½4=-1359.1 KJ, thus the reaction is exothermic. And since the reactions of other alcohols are similar then we can say that the other alcohol combustions are exothermic.Another fact that we must know is that the end products of any combustion reaction are carbon dioxide and water, but before the new molecules can be formed, a certain energy level is needed to give sufficient energy for the collision by what means that if the energy is not sufficient or incorrectly orientated the react ants will not form, sufficient energy that is needed to be reached is the activation energy of the system to form the activated complex that the atoms are separated.From the state of transition the particles in the molecules now attract to particles of opposite charge, and the orbital become over lapped that the some electrons of the orbital in the outer shell are influenced by both nuclei and therefore forms the molecular orbital (M.O.), and the electrons occupies the orbital whose energy is the lowest available to it. The filling of electrons to the M.O. i.e. the orbital in the sub-shells of the shells are filled up with electrons leads to the drop in energy level of the electrons which can also be called bond energy since it is the energy needed for the transition of energy level of the electrons. This can also be regarded as spontaneous change of the system that it tend to a minimum in potential energy, because the first law of thermodynamics states that energy can neither be cr eated nor destroyed but is simply transferred from one form or system another, the decrease in the energy level of the electrons must mean that energy is transferred to the surroundings.From the information above I can now decide that the energy released per mole is determine by the decrease in energy level of the electrons of the valence shell spontaneously and the number of M.O. When there are more carbon atoms with in an alcohol, there will be more hydrogen atoms within the molecule as well, so that when the new molecules are formed there will be more M.O. of the similar sort formed and more energy will be released, according to the theories I have explained above.If we know the value of the reduction in the energy level when the M.O. are formed (the bond energy), the symbol equation of the reactions and the relative atomic mass (R.A.M.), then it is possible to calculate the energy given out per mole. I will work out the energy released per mole and I would expect the result of m y experiment follow a similar pattern of increase of the set of values below. As we already knew, C-H=413; C-O=336; C==O=805; H-O=464; O==O=498.3; C-C=347Methanol: 2CH3OH+3O2= 2CO2 +4H2O(413à ¯Ã‚ ¿Ã‚ ½3+336+464)à ¯Ã‚ ¿Ã‚ ½2+498.3à ¯Ã‚ ¿Ã‚ ½3-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½2-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½4=-1359.1 kJ; 1359.1?2=679.55kJ mol-1Ethanol: C2H5OH+3O2=2CO2+3H2O347+413à ¯Ã‚ ¿Ã‚ ½5+336+464+3à ¯Ã‚ ¿Ã‚ ½498.3-(805à ¯Ã‚ ¿Ã‚ ½2)à ¯Ã‚ ¿Ã‚ ½2-(464à ¯Ã‚ ¿Ã‚ ½2)à ¯Ã‚ ¿Ã‚ ½= -1297.1kJ1297.1à ¯Ã‚ ¿Ã‚ ½1=1297.1 kJ mol-1Propan-1-ol: 2C3H7OH+9O2=6CO2+8H2O(347à ¯Ã‚ ¿Ã‚ ½2+413à ¯Ã‚ ¿Ã‚ ½7+336+464)à ¯Ã‚ ¿Ã‚ ½2+498.3à ¯Ã‚ ¿Ã‚ ½9-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½6-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½8= -3829.3kJ3829.3à ¯Ã‚ ¿Ã‚ ½2=1914.65 kJ mol-1Butan-1-ol: C4H9OH+6O2=4CO2+5H2O347à ¯Ã‚ ¿Ã‚ ½3+413à ¯Ã‚ ¿Ã‚ ½9+336+464+498.3à ¯Ã‚ ¿Ã‚ ½6-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½4-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½5= -2532.2kJ2532.2à ¯Ã‚ ¿Ã‚ ½1=2532.2kJ mol-1From these set of results it is possible to predict that as the number of carbon atoms increases within an alcohol molecule, the energy out put per mole will also increase.Safety* Alcohols are highly flammable so that the spirit burners must be dealt with caution, any alcohol spillages on any surfaces must be cleaned immediately in case of fire.* Alcohols can cause blindness and death when took into the body, one must seek medical attention when took in.* Avoid touching the apparatus directly after experiments, when which will be heated up.* The flame must be kept distance away from other unnecessary apparatus.* Safety goggles and lab coats must be worn, and first aid kits and other first aid equipments must be ready in case of emergencies. (See photo 4)Apparatus* Spirit burner containing methanol, ethanol, propanol-1-ol and butanol-1-ol* Stand, boss and clamp* Thermometer* Digital balance accurate to 10-2 digits* Ruler* 2à ¯Ã‚ ¿Ã‚ ½100ml2 measuring cylinder* Safety goggles, lab coats* Stop clock* Tin can* Heat proof mat(See photo 1)Method In order to carry out this investigation, two measurements must be taken; they are the loss in the weight of the alcohols, and the temperature change of the water. Subsequently before we can start the experiment we must measure the weight of the spirit burner, and record the reading. Then the stand boss and the clamp should be set up to fix the tin in place. The reason why I have chosen the tin to be the calorimeter is because it is a good conductor to heat thus it has a relatively low heat capacity, and more kinetic energy can be passed to the water molecules efficiently to make accurate my results.The spirit burner should be positioned directly beneath the tin and a heat proof mat is needed to be placed under the spirit burner. The distance between the peak of the wick and the bottom of the tin must be kept constant in order to carry out a fair comparison. A draught shield is needed to be placed around the spirit burner and the tin to prevent the unnecessary heat loss that could v ary the result of the experiment. (See photo 2) After the apparatus have been set up as described above, then we must measure 200ml of water of 2à ¯Ã‚ ¿Ã‚ ½100ml measuring cylinder and add which to the tin, and then place the thermometer to the water and wait until the reading is stable. It important to keep the volume of water constant since the energy required to raise 1oc is associated with the mass.This stable reading can give the actual temperature before the experiment and this also tells me the temperature of the tin since the one have higher energy tends to give out energy spontaneously and equilibrium can be reached between the two. Knowing the heat capacity of the tin it is possible to calculate how much energy the calorimeter receives and this can give me a more accurate value of the heat generated by the alcohol. Since equilibrium can be reached by energy transfer from a hotter system to a colder, I can therefor say that the temperature of the tin can is almost the same as the water. Now that knowing the heat capacity of the calorimeter system which is 0.277 kJ m3 oc and the weight of the tin can is 40.937g, then the energy that had been absorbed in each of the experiments can be calculated.After the preparations it is time to start the experiment by lighting the spirit burner thought the hole in the draught shield using a stick. The experiment will be carried out for approximately 180 seconds, the time is set upon the preliminary work I have done that this could prevent the maximum evaporation of water while efficient energy can be gained by the water to show a positive result. The reading from the thermometer must be taking quite exactly the same time when the flame extinguishes so that an accurate value can result that further out put of energy that will not be taken into account can be avoided.The spirit burner must also be weighed immediately to give a result as accurate as possible, since the weight can be reduced from other ways such as eva poration. The experiment of each alcohol will be carried out 3 times to give an accurate result and the same experiment will be repeated for each alcohol. Between each experiment it is necessary to clean off the carbon as the result of incomplete combustion produced at the bottom of the tin, because it can act as an insulator which will have effects on the accuracy of the results. One other of the natures of combustions is that the flame is not stable and within a flame the distribution of heat is not equal.Consequently it must me made sure that the sizes of the flames are the same since the distance between the wick and the tin can is already at constant. A difference between the cotton part, which is the interior of the wick, and the exterior material can cause a difference in the size of the flame, thus I have decided to cut the wick before each experiment to maintain the size of the flames. (See Photo 3) At this point it is vital to point out that the range of alcohol used be li mited within the primary alcohols, which all have similar molecular structures in terms of the arrangement, so that methanol, ethanol, propan-1-ol and butan-1-ol are used. I also felt that there is no significance in caring out the experiment further that pentan-1-ol and hexan-1-ol are necessary, since I can discover the pattern from the first four.Fair testIn the table below I will illustrate the thing that I will keep constant and that will vary to produce results of use.VariablesConstantsType of primary alcoholVolume of waterApproximately the same timeDistance between the top of spirit burner and the bottom of tinApproximately the same surface area of tin covered by the draught shieldWickThe same calorimeterResults:(See table 1, 2, 3 and graph 1, 2,3)Analysis:By looking a Graph 1, it is possible to see the correlation between the number of carbon atoms and the energy output per mole. The correlation had illustrated that both the expected values and observed values are positive, h ow ever the expected values increase steadily with a high gradient than the values of the experiment. The outcome was expected and the cause had already been explained in the hypothesis. First by nature it is not possible to make 100% use from the energy given out by the reaction, because the energy given is mainly in the form of heat, the movement of particles that can be lost very easily.Evidence have also shown that the combustion is not complete because carbon, one of the activated complex in the process of the reaction had not been combined with oxygen forming carbon dioxide, thus less energy is produced by the reaction due to the incomplete combustion; the amount of carbon collected at the bottom of the tin can had increased as the alcohols containing more carbon was used, showing that more of the combustion/reaction was incomplete when the time for each spirit burner to combust was roughly 180 seconds.From graph 1 along, it is difficult to identify the anomalies due to its sc ale, thus the observed results had been put onto a new graph. (See graph 3) From the graph it is then possible to see that there is no anomalies in the experiment since the line of best fit goes through the error bars of the plotted points on the graph, the error bars represented the possible variation of data due to the inaccuracies experiment. But when looking at graph 2, the percentage of accuracy decreases as the number of carbon increases, butan-1-ol in particular had an anomalous value. If one of the values of the data in the percentage/accuracy graph is anomalous, then this value must also be at the wrong position in the energy output/carbon atoms graph, however there is not enough evident to investigate further.The characteristics of this calorimeter system only allows us to measure the heat transfer from one system to another, however heat was not the only product of the reaction that a relatively large part of the energy is in the forms of light, which cannot be measured b y the calorimeter system. However the difference in the gradient of the two lines of best fit had shown that they increase at different rates, i.e. there are errors in the last experiments which had made the rate of increase of the observed values differ from the expected.The percentage of accuracy of the results obtain from the experiment is shown on graph 2. From which it is clear that the results became less accurate as the chain of carbons got longer, in theory the molecule will increase its activation energy as the number of carbon atoms increases because each carbon atom have 4 half full sub-shells, since the electrons follow the Hund principle which states that when filling a sub-shell, there is less electron repulsion if each of each orbital is half-filled first before any single one is completely filled.In the M shell of carbon, 2s, 2px, 2py and 2pz orbital are half filled of that the 4 unpaired electrons can attract 4 other nuclei, thus the more carbon there is the half fi lled orbital there are. Again, as I had stated in my prediction that the energy level, the potential energy in particular of the electrons will drop, when an orbital is full, therefore more energy is required to provide sufficient energy i.e. bring back the initial energy level of the electrons for collision to occur properly. The more carbon atoms there are, the fuller orbital thus larger amount of energy will fall. The higher activation energy made difficult the supply of which, thus a larger amount is combusted improperly, and this can then explain the decrease in percentage of accuracy.Equally if there are more carbon atoms in the reactants, more products will form, and I had already investigated in my prediction that the reaction is exothermic, i.e. the energy given by the products is higher than the energy put in to the system due to the characteristics of different types of bonds. In this case, there are more bonds in the products, although the type of bonding may be differen t (? and ? bonds) that they have different energy levels.From my results it is possible of see that as the number of carbon atoms increased in a primary alcohol molecule, the energy output of it also increases. This had matched my prediction although the pattern between the expected and the observed is different.Evaluation:The results had shown a positive correlation between the set of results, however the results had also shown that the experiment did not accurately measure the energy output of the alcohols on graph 1. However there is potential to make more accurate the experiment by using method that could prevent as much heat loss as possible.Before it is possible to make further improvements on the investigation, probable errors must be identified and analyzed. It would consolidated my conclusion, in witch the particular errors are unidentified, if I had more evidence about the trend in the deduction of the percentage of accuracy, thus I would be a good idea to obtain the value s of pentan-1-ol and hexan-1-ol. However if the equipments such as a variety of alcohols are not available, then more accurate methods can my applied to the current investigation to reduce the probability of anomalies occurring.First the heat produced by the reaction is not efficiently used to heat up the water, which can cause potential inaccuracies; some heat is lost to the surroundings and not taking in by water, because some would be conducted away by the apparatus e.g. the tin can some would be absorbed by the cylinder (not include in the calculation) and some lost through convection or move spontaneously to where air molecules have less energy due to nature. To solve the problem black painted tin cans which is able to absorb the maximum radiation given, and the infra red waved are able to heat up the water molecules. Yet not all part of the tin should be painted black, the inside and the outside of the sides of the tin can must maintain its shiny colour to prevent radiation gi ven out by the heated up tin can.Some sort of insulation of the tin can is also able to avoid heat lost through conduction, consequently the tin can should be wrapped with wools to preserve the heat within. The apparatus that are purposed to preserve the heat are not all ideal, the cylinder used to increase the heat given to tin can should have had a higher heat capacity, because the draught shield was heated up but the large amount of energy, due to the large change in temperature, cannot and was not calculated. It would possibly be a good idea to use a better insulated draught shield, so that it would also by wrapped with wools and coated with silver paint to reduce conduction and radiation to the minimal. An enclosed and well insulated chamber can also increase the efficiency of the usage of the energy, by bring to a close the escape of the heat.Many other faults were caused by ineffectual apparatus. The hole that was used to light spirit burner acted as a drought, which provided oxygen which is an element in the equation of combustion, but this also had made the flame unstable due to the movement of the air. The thermometer was accurate 0.5 oC which could impact the final result, if the thermometer was accurate to 10-2 the results would be more accurate and more reliable. The shielding that are purposed to prevent heat loss can impede the process of putting off the flame, therefore the change in mass did not match the reading of the thermometer when taken, and the level of heat with in the chamber will not be consistent through out the experiment when attempting to distinguish the flame by capping the burner. This problem would be very difficult to solve that it would be difficult to have an enclosed system to prevent heat loss and to ensure that the flame can be distinguished easily.One other cause of error of my experiment was that the alcohols are not completely combusted because the activation energy cannot be reached when only little partition of the alcohols in the spirit burner are being burnt and not producing enough energy for efficient collision between particles so that carbon atoms are formed at the bottom of the tin can. The building up of the carbon also acted as an insulator that the heat cannot be conducted to the tin can and will impact on the results of my experiment. Again this is a problem that I have to face when the experiment is repeated, although the carbon can be displace after each experiment, but the effect of which during the experiment cannot be solved.Now that I think it is appropriate to introduce a different method which would guarantee the energy of the reaction can be accurately measured. In the current experiment heat loss to the surroundings and therefore the energy towards the water was not efficient, but if the surroundings, where heat is given to, is water then maximum percentage of energy released by the experiment would be given to water where it can be measured. The error occurred in measurin g the mass was also a factor affecting the anomalous results, thus a given mass can be allowed to be completely combusted so that an accurate value can be obtained.Some of the energy given to water are lost, or transferred to the surrounding of the calorimeter which cannot be measured, the heat is transferred is because one system has more energy than the other. Knowing this if the calorimeter can be maintained at the same temperature as the water with, no heat transfer can occur through conduction, and when the calorimeter is concealed no further heat can escape by convection. In order to reduce radiation, as described above, the calorimeter can be coated in shiny colour. Rather than preceding the experiment in a spirit burner, where only a little mass of alcohol was being burnt which could not proved efficient energy output that the wrong proportion of which could be used to provide the efficiency for collision, and result in incomplete combustion.A larger mass could be burnt in a given length of time to produce more energy to secure further efficiency in collision. The appropriate apparatus which suites the description above would be a bomb calorimeter. (See diagram 1) The combustion would take place in the bomb where is cased with steel, which could with stand the impact of the explosion when alcohol being combusted and also conduct heat to the calorimeter. Within the bomb the reaction is triggered by a fuse-wire which is conducted to the mains, the fuse then burns the cotton attached to it and light the flame.The bomb is also well supplied with 25 atmosphere of oxygen, pumped in with a pipe, thus no draught is need. The bomb then will be placed in a calorimeter system filled with water, as stated above that maximum energy can be transferred in the water which can then be measured, the wall of this calorimeter will be filled with water and the temperature of which is controlled by a coil which equalizes the temperature so that heat cannot can not escape or get into the calorimeter. Because the heat cannot be transferred in or out of the calorimeter, the maximum temperature the system reaches would be almost, if not all the free energy of the reaction.As well as to discover the pattern among the primary alcohols, secondary and tertiary alcohols can also be investigated. We already know the relationship between the numbers of carbon atoms or the length of the carbon chain and the energy output, it would be equally significant to learn the science when the carbons are not in a chain or a irregular chain, and how a hybridized carbon if any at all is able to alter the results. Investigations could be among propan-2-ol, butan-2-ol, pentan-2-ol, hexan-2-ol, cyclohexanol and 2-methyl-propan-2-ol. The heat given out by different types of primary alcohols Essay Example The heat given out by different types of primary alcohols Essay In my investigation I will measure the heat given out by different types of primary alcohols when combusting with oxygen and compare the difference in the energy out put per mole of different alcohols.HypothesesBefore we can have a look at the heat content of the different alcohols, we must be able to understand the process of combustion, the changes of the energy within the system while combusting with oxygen and how to determine the difference of the energy given out per unit.First it is crucial to know that it is the external energy that we are measuring of the system, because as the Second Law of thermodynamics states that heat cannot be completely converted into work without some part of the system undergoing change, a equation is applied to the law illustrates that H (total heat content) = G (free energy) + TS (temperatureà ¯Ã‚ ¿Ã‚ ½entropy, TS is the unfree energy which is associated with the degree of disorder of the system), and H can only be equal to G when TS=0 which only takes place at the temperature of absolute zero.We therefore cannot measure the total change in enthalpy (total heat content) since the 3rd law of thermodynamics states that absolute zero cannot be reached; the entropy which measures the degree of disorder also increases spontaneously that the particles of the system become disorderer or more random. What this investigation measures is the spontaneous change in the free energy which is converted into heat as stated in the second law of thermodynamics.Then it is necessary to know that the reaction is exothermic that is heat or in another word kinetic energy and light energy, which is the emission given out when the exited electron return to a lower energy levels, are given out to the surroundings causing the surroundings to gain more kinetic energy and rise in temperature. We can measure the different values of the bond energy of the reactants and the variation between the two values, if the value of variation is positive i.e. when energy is gained the reaction is endothermic, but if the value appears to be negative, then the reaction is exothermic. It is possible to calculate the average bond energy measured in kilo joules per mole (DH/KJ mol-1) and determine the variation. Knowing that C-H=413; C-O=336; C==O=805; H-O=464; O==O=498.3 and the following equation it is possible to calculate ?E.2CH3 (OH) +3O2= 2CO2 +4H2O(413à ¯Ã‚ ¿Ã‚ ½3+336+464)à ¯Ã‚ ¿Ã‚ ½2+498.3à ¯Ã‚ ¿Ã‚ ½3-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½2-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½4=-1359.1 KJ, thus the reaction is exothermic. And since the reactions of other alcohols are similar then we can say that the other alcohol combustions are exothermic.Another fact that we must know is that the end products of any combustion reaction are carbon dioxide and water, but before the new molecules can be formed, a certain energy level is needed to give sufficient energy for the collision by what means that if the energy is not sufficient or incorrectly orientated the react ants will not form, sufficient energy that is needed to be reached is the activation energy of the system to form the activated complex that the atoms are separated.From the state of transition the particles in the molecules now attract to particles of opposite charge, and the orbital become over lapped that the some electrons of the orbital in the outer shell are influenced by both nuclei and therefore forms the molecular orbital (M.O.), and the electrons occupies the orbital whose energy is the lowest available to it. The filling of electrons to the M.O. i.e. the orbital in the sub-shells of the shells are filled up with electrons leads to the drop in energy level of the electrons which can also be called bond energy since it is the energy needed for the transition of energy level of the electrons. This can also be regarded as spontaneous change of the system that it tend to a minimum in potential energy, because the first law of thermodynamics states that energy can neither be cr eated nor destroyed but is simply transferred from one form or system another, the decrease in the energy level of the electrons must mean that energy is transferred to the surroundings.From the information above I can now decide that the energy released per mole is determine by the decrease in energy level of the electrons of the valence shell spontaneously and the number of M.O. When there are more carbon atoms with in an alcohol, there will be more hydrogen atoms within the molecule as well, so that when the new molecules are formed there will be more M.O. of the similar sort formed and more energy will be released, according to the theories I have explained above.If we know the value of the reduction in the energy level when the M.O. are formed (the bond energy), the symbol equation of the reactions and the relative atomic mass (R.A.M.), then it is possible to calculate the energy given out per mole. I will work out the energy released per mole and I would expect the result of m y experiment follow a similar pattern of increase of the set of values below. As we already knew, C-H=413; C-O=336; C==O=805; H-O=464; O==O=498.3; C-C=347Methanol: 2CH3OH+3O2= 2CO2 +4H2O(413à ¯Ã‚ ¿Ã‚ ½3+336+464)à ¯Ã‚ ¿Ã‚ ½2+498.3à ¯Ã‚ ¿Ã‚ ½3-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½2-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½4=-1359.1 kJ; 1359.1?2=679.55kJ mol-1Ethanol: C2H5OH+3O2=2CO2+3H2O347+413à ¯Ã‚ ¿Ã‚ ½5+336+464+3à ¯Ã‚ ¿Ã‚ ½498.3-(805à ¯Ã‚ ¿Ã‚ ½2)à ¯Ã‚ ¿Ã‚ ½2-(464à ¯Ã‚ ¿Ã‚ ½2)à ¯Ã‚ ¿Ã‚ ½= -1297.1kJ1297.1à ¯Ã‚ ¿Ã‚ ½1=1297.1 kJ mol-1Propan-1-ol: 2C3H7OH+9O2=6CO2+8H2O(347à ¯Ã‚ ¿Ã‚ ½2+413à ¯Ã‚ ¿Ã‚ ½7+336+464)à ¯Ã‚ ¿Ã‚ ½2+498.3à ¯Ã‚ ¿Ã‚ ½9-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½6-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½8= -3829.3kJ3829.3à ¯Ã‚ ¿Ã‚ ½2=1914.65 kJ mol-1Butan-1-ol: C4H9OH+6O2=4CO2+5H2O347à ¯Ã‚ ¿Ã‚ ½3+413à ¯Ã‚ ¿Ã‚ ½9+336+464+498.3à ¯Ã‚ ¿Ã‚ ½6-805à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½4-464à ¯Ã‚ ¿Ã‚ ½2à ¯Ã‚ ¿Ã‚ ½5= -2532.2kJ2532.2à ¯Ã‚ ¿Ã‚ ½1=2532.2kJ mol-1From these set of results it is possible to predict that as the number of carbon atoms increases within an alcohol molecule, the energy out put per mole will also increase.Safety* Alcohols are highly flammable so that the spirit burners must be dealt with caution, any alcohol spillages on any surfaces must be cleaned immediately in case of fire.* Alcohols can cause blindness and death when took into the body, one must seek medical attention when took in.* Avoid touching the apparatus directly after experiments, when which will be heated up.* The flame must be kept distance away from other unnecessary apparatus.* Safety goggles and lab coats must be worn, and first aid kits and other first aid equipments must be ready in case of emergencies. (See photo 4)Apparatus* Spirit burner containing methanol, ethanol, propanol-1-ol and butanol-1-ol* Stand, boss and clamp* Thermometer* Digital balance accurate to 10-2 digits* Ruler* 2à ¯Ã‚ ¿Ã‚ ½100ml2 measuring cylinder* Safety goggles, lab coats* Stop clock* Tin can* Heat proof mat(See photo 1)Method In order to carry out this investigation, two measurements must be taken; they are the loss in the weight of the alcohols, and the temperature change of the water. Subsequently before we can start the experiment we must measure the weight of the spirit burner, and record the reading. Then the stand boss and the clamp should be set up to fix the tin in place. The reason why I have chosen the tin to be the calorimeter is because it is a good conductor to heat thus it has a relatively low heat capacity, and more kinetic energy can be passed to the water molecules efficiently to make accurate my results.The spirit burner should be positioned directly beneath the tin and a heat proof mat is needed to be placed under the spirit burner. The distance between the peak of the wick and the bottom of the tin must be kept constant in order to carry out a fair comparison. A draught shield is needed to be placed around the spirit burner and the tin to prevent the unnecessary heat loss that could v ary the result of the experiment. (See photo 2) After the apparatus have been set up as described above, then we must measure 200ml of water of 2à ¯Ã‚ ¿Ã‚ ½100ml measuring cylinder and add which to the tin, and then place the thermometer to the water and wait until the reading is stable. It important to keep the volume of water constant since the energy required to raise 1oc is associated with the mass.This stable reading can give the actual temperature before the experiment and this also tells me the temperature of the tin since the one have higher energy tends to give out energy spontaneously and equilibrium can be reached between the two. Knowing the heat capacity of the tin it is possible to calculate how much energy the calorimeter receives and this can give me a more accurate value of the heat generated by the alcohol. Since equilibrium can be reached by energy transfer from a hotter system to a colder, I can therefor say that the temperature of the tin can is almost the same as the water. Now that knowing the heat capacity of the calorimeter system which is 0.277 kJ m3 oc and the weight of the tin can is 40.937g, then the energy that had been absorbed in each of the experiments can be calculated.After the preparations it is time to start the experiment by lighting the spirit burner thought the hole in the draught shield using a stick. The experiment will be carried out for approximately 180 seconds, the time is set upon the preliminary work I have done that this could prevent the maximum evaporation of water while efficient energy can be gained by the water to show a positive result. The reading from the thermometer must be taking quite exactly the same time when the flame extinguishes so that an accurate value can result that further out put of energy that will not be taken into account can be avoided.The spirit burner must also be weighed immediately to give a result as accurate as possible, since the weight can be reduced from other ways such as eva poration. The experiment of each alcohol will be carried out 3 times to give an accurate result and the same experiment will be repeated for each alcohol. Between each experiment it is necessary to clean off the carbon as the result of incomplete combustion produced at the bottom of the tin, because it can act as an insulator which will have effects on the accuracy of the results. One other of the natures of combustions is that the flame is not stable and within a flame the distribution of heat is not equal.Consequently it must me made sure that the sizes of the flames are the same since the distance between the wick and the tin can is already at constant. A difference between the cotton part, which is the interior of the wick, and the exterior material can cause a difference in the size of the flame, thus I have decided to cut the wick before each experiment to maintain the size of the flames. (See Photo 3) At this point it is vital to point out that the range of alcohol used be li mited within the primary alcohols, which all have similar molecular structures in terms of the arrangement, so that methanol, ethanol, propan-1-ol and butan-1-ol are used. I also felt that there is no significance in caring out the experiment further that pentan-1-ol and hexan-1-ol are necessary, since I can discover the pattern from the first four.Fair testIn the table below I will illustrate the thing that I will keep constant and that will vary to produce results of use.VariablesConstantsType of primary alcoholVolume of waterApproximately the same timeDistance between the top of spirit burner and the bottom of tinApproximately the same surface area of tin covered by the draught shieldWickThe same calorimeterResults:(See table 1, 2, 3 and graph 1, 2,3)Analysis:By looking a Graph 1, it is possible to see the correlation between the number of carbon atoms and the energy output per mole. The correlation had illustrated that both the expected values and observed values are positive, h ow ever the expected values increase steadily with a high gradient than the values of the experiment. The outcome was expected and the cause had already been explained in the hypothesis. First by nature it is not possible to make 100% use from the energy given out by the reaction, because the energy given is mainly in the form of heat, the movement of particles that can be lost very easily.Evidence have also shown that the combustion is not complete because carbon, one of the activated complex in the process of the reaction had not been combined with oxygen forming carbon dioxide, thus less energy is produced by the reaction due to the incomplete combustion; the amount of carbon collected at the bottom of the tin can had increased as the alcohols containing more carbon was used, showing that more of the combustion/reaction was incomplete when the time for each spirit burner to combust was roughly 180 seconds.From graph 1 along, it is difficult to identify the anomalies due to its sc ale, thus the observed results had been put onto a new graph. (See graph 3) From the graph it is then possible to see that there is no anomalies in the experiment since the line of best fit goes through the error bars of the plotted points on the graph, the error bars represented the possible variation of data due to the inaccuracies experiment. But when looking at graph 2, the percentage of accuracy decreases as the number of carbon increases, butan-1-ol in particular had an anomalous value. If one of the values of the data in the percentage/accuracy graph is anomalous, then this value must also be at the wrong position in the energy output/carbon atoms graph, however there is not enough evident to investigate further.The characteristics of this calorimeter system only allows us to measure the heat transfer from one system to another, however heat was not the only product of the reaction that a relatively large part of the energy is in the forms of light, which cannot be measured b y the calorimeter system. However the difference in the gradient of the two lines of best fit had shown that they increase at different rates, i.e. there are errors in the last experiments which had made the rate of increase of the observed values differ from the expected.The percentage of accuracy of the results obtain from the experiment is shown on graph 2. From which it is clear that the results became less accurate as the chain of carbons got longer, in theory the molecule will increase its activation energy as the number of carbon atoms increases because each carbon atom have 4 half full sub-shells, since the electrons follow the Hund principle which states that when filling a sub-shell, there is less electron repulsion if each of each orbital is half-filled first before any single one is completely filled.In the M shell of carbon, 2s, 2px, 2py and 2pz orbital are half filled of that the 4 unpaired electrons can attract 4 other nuclei, thus the more carbon there is the half fi lled orbital there are. Again, as I had stated in my prediction that the energy level, the potential energy in particular of the electrons will drop, when an orbital is full, therefore more energy is required to provide sufficient energy i.e. bring back the initial energy level of the electrons for collision to occur properly. The more carbon atoms there are, the fuller orbital thus larger amount of energy will fall. The higher activation energy made difficult the supply of which, thus a larger amount is combusted improperly, and this can then explain the decrease in percentage of accuracy.Equally if there are more carbon atoms in the reactants, more products will form, and I had already investigated in my prediction that the reaction is exothermic, i.e. the energy given by the products is higher than the energy put in to the system due to the characteristics of different types of bonds. In this case, there are more bonds in the products, although the type of bonding may be differen t (? and ? bonds) that they have different energy levels.From my results it is possible of see that as the number of carbon atoms increased in a primary alcohol molecule, the energy output of it also increases. This had matched my prediction although the pattern between the expected and the observed is different.Evaluation:The results had shown a positive correlation between the set of results, however the results had also shown that the experiment did not accurately measure the energy output of the alcohols on graph 1. However there is potential to make more accurate the experiment by using method that could prevent as much heat loss as possible.Before it is possible to make further improvements on the investigation, probable errors must be identified and analyzed. It would consolidated my conclusion, in witch the particular errors are unidentified, if I had more evidence about the trend in the deduction of the percentage of accuracy, thus I would be a good idea to obtain the value s of pentan-1-ol and hexan-1-ol. However if the equipments such as a variety of alcohols are not available, then more accurate methods can my applied to the current investigation to reduce the probability of anomalies occurring.First the heat produced by the reaction is not efficiently used to heat up the water, which can cause potential inaccuracies; some heat is lost to the surroundings and not taking in by water, because some would be conducted away by the apparatus e.g. the tin can some would be absorbed by the cylinder (not include in the calculation) and some lost through convection or move spontaneously to where air molecules have less energy due to nature. To solve the problem black painted tin cans which is able to absorb the maximum radiation given, and the infra red waved are able to heat up the water molecules. Yet not all part of the tin should be painted black, the inside and the outside of the sides of the tin can must maintain its shiny colour to prevent radiation gi ven out by the heated up tin can.Some sort of insulation of the tin can is also able to avoid heat lost through conduction, consequently the tin can should be wrapped with wools to preserve the heat within. The apparatus that are purposed to preserve the heat are not all ideal, the cylinder used to increase the heat given to tin can should have had a higher heat capacity, because the draught shield was heated up but the large amount of energy, due to the large change in temperature, cannot and was not calculated. It would possibly be a good idea to use a better insulated draught shield, so that it would also by wrapped with wools and coated with silver paint to reduce conduction and radiation to the minimal. An enclosed and well insulated chamber can also increase the efficiency of the usage of the energy, by bring to a close the escape of the heat.Many other faults were caused by ineffectual apparatus. The hole that was used to light spirit burner acted as a drought, which provided oxygen which is an element in the equation of combustion, but this also had made the flame unstable due to the movement of the air. The thermometer was accurate 0.5 oC which could impact the final result, if the thermometer was accurate to 10-2 the results would be more accurate and more reliable. The shielding that are purposed to prevent heat loss can impede the process of putting off the flame, therefore the change in mass did not match the reading of the thermometer when taken, and the level of heat with in the chamber will not be consistent through out the experiment when attempting to distinguish the flame by capping the burner. This problem would be very difficult to solve that it would be difficult to have an enclosed system to prevent heat loss and to ensure that the flame can be distinguished easily.One other cause of error of my experiment was that the alcohols are not completely combusted because the activation energy cannot be reached when only little partition of the alcohols in the spirit burner are being burnt and not producing enough energy for efficient collision between particles so that carbon atoms are formed at the bottom of the tin can. The building up of the carbon also acted as an insulator that the heat cannot be conducted to the tin can and will impact on the results of my experiment. Again this is a problem that I have to face when the experiment is repeated, although the carbon can be displace after each experiment, but the effect of which during the experiment cannot be solved.Now that I think it is appropriate to introduce a different method which would guarantee the energy of the reaction can be accurately measured. In the current experiment heat loss to the surroundings and therefore the energy towards the water was not efficient, but if the surroundings, where heat is given to, is water then maximum percentage of energy released by the experiment would be given to water where it can be measured. The error occurred in measurin g the mass was also a factor affecting the anomalous results, thus a given mass can be allowed to be completely combusted so that an accurate value can be obtained.Some of the energy given to water are lost, or transferred to the surrounding of the calorimeter which cannot be measured, the heat is transferred is because one system has more energy than the other. Knowing this if the calorimeter can be maintained at the same temperature as the water with, no heat transfer can occur through conduction, and when the calorimeter is concealed no further heat can escape by convection. In order to reduce radiation, as described above, the calorimeter can be coated in shiny colour. Rather than preceding the experiment in a spirit burner, where only a little mass of alcohol was being burnt which could not proved efficient energy output that the wrong proportion of which could be used to provide the efficiency for collision, and result in incomplete combustion.A larger mass could be burnt in a given length of time to produce more energy to secure further efficiency in collision. The appropriate apparatus which suites the description above would be a bomb calorimeter. (See diagram 1) The combustion would take place in the bomb where is cased with steel, which could with stand the impact of the explosion when alcohol being combusted and also conduct heat to the calorimeter. Within the bomb the reaction is triggered by a fuse-wire which is conducted to the mains, the fuse then burns the cotton attached to it and light the flame.The bomb is also well supplied with 25 atmosphere of oxygen, pumped in with a pipe, thus no draught is need. The bomb then will be placed in a calorimeter system filled with water, as stated above that maximum energy can be transferred in the water which can then be measured, the wall of this calorimeter will be filled with water and the temperature of which is controlled by a coil which equalizes the temperature so that heat cannot can not escape or get into the calorimeter. Because the heat cannot be transferred in or out of the calorimeter, the maximum temperature the system reaches would be almost, if not all the free energy of the reaction.As well as to discover the pattern among the primary alcohols, secondary and tertiary alcohols can also be investigated. We already know the relationship between the numbers of carbon atoms or the length of the carbon chain and the energy output, it would be equally significant to learn the science when the carbons are not in a chain or a irregular chain, and how a hybridized carbon if any at all is able to alter the results. Investigations could be among propan-2-ol, butan-2-ol, pentan-2-ol, hexan-2-ol, cyclohexanol and 2-methyl-propan-2-ol.

Pure Capitalism Essays - Taxation, Public Finance, Tax, Income Tax

Pure Capitalism Essays - Taxation, Public Finance, Tax, Income Tax Pure Capitalism My idea of the perfect government could be called ?Pure Capitalism?. It is based on survival of the fittest and not all people are created equal. To explain this government I will compare it to our current system. The biggest concept is that the people have complete control of most all economic conditions. Taxes: I do not believe in an income tax, I want to choose what I do with my money. Income in my view is a form of double taxation. To make up for the loss of no income tax, the sales taxes would be increased, not only would this allow people to have more control over there money it would virtually eliminate tax fraud. The sales tax could not tax food intended for consumption, clothing, or other Basic necessities of life. On average products the rate would be a flat percentage rate, and on products considered luxiourus the rate would be exponential, much like our current income tax system. A new administration would be formed to control the rates and stop double taxation. The inheritance tax would be abolished, if I want to work hard my life, throw all of my money in the bank, and leave it to my kids so that they can sit around doing nothing till the day they die, I shouldn?t have to pay for politicians to do sit around there whole life too. Welfare: The current welfare program pisses me off. In pure capitalism there would be a one year minimum for basic welfare, after that, all you get is a big ?good luck!, no one ever said life was fair?. If you can?t get a job in 365 days you don?t deserve for me to support you. The only exception here would be if someone was receiving average or higher education, in which the welfare program would last one year after completing the course. A set amount of bonus welfare would be received for each dependent when the program is started, but a deduction larger that the original bonus for any children born after the program has started. This is to discourage the inferior from reproducing. Poor breed poor. Again there is any exception for advrige or higher education received. In order to encourage private businesses to form, an extremely powerful business loss compensation loss program would be designed. In order for an economy like this one to survive, it takes guts on the part of the individual, unfortunately that is the reason many potential Trumps are never discovered. To counteract this, any business which is registered with the gov?t and then fails, will have compensation equal to the amount invested in the business initially, that way someone couldn?t start a business, inflate the vaule till it is about to crash, then liquidate to receive the amount of the inflated value. They could only get to amount they invested in it back. Labor: Every business needs a power work machine. Labor Unions in my ideal economy would have much more power provided by the government. Corporations would be required to sell stock to its workers. 401(k) plans would be highly encouraged, and other fringe benefits provided. When you retire the amount recieved would be based on two things. (1) How successful you where in life. (2) How hard you worked. With higher emphasis on number 2, people who have lower job skills would still be encouraged to work harder, knowing that it will eventually pay off in the long run. Poor breeds poor, but if the poor stay on the right track, they can still have a decient life. This last section is to cover the broader based ideals in the perfect economy. Kill the ?All people created equal polacy.? Lets face it, some poeple are superior and some are inferior, the minorities can?t call for affirmative action by hiding behind that statement. If I want to hire someone based on the color of there skin or there fathers father, I will do it. Forget minimum wage, you get paid what you are worth, if you are worthless you get paid less. Likewise, if you have a good education and give it your all, you are worth more and thus get paid more. Though bleeding hearts would be in tears after reading this, I belive that this economy, though vague, would create a world power compairable to the present world military condition, alowing us to control the weak, not bleed all over them.

Drama Essay Example | Topics and Well Written Essays - 5000 words

Drama - Essay Example Much can be discerned about the nature of average lifestyles in post-World War II America through an examination of the play’s plot structure, other sensual elements, language, contextualization and form. Tennessee Williams’ play A Streetcar Named Desire is based in post World War II New Orleans, specifically the French Quarter, where a mixed ethnic and social working class group attempt to live in close proximity to each other without coming to blows. It is a noisy, sometimes violent and always busy neighborhood that opens up to Blanche Dubois at the opening of the play. Blanche is a retiring former Southern Belle now attempting to pick up the pieces of her shattered life and shattered psyche to make a new start. She arrives at her sister’s tiny apartment, consisting only of two rooms separated by a flimsy curtain, explaining how she has been given a lengthy leave of absence from her teaching position in Laurel, Mississippi in an effort to provide her the time she needs to restore her nerves. From here, Blanche only becomes more complicated, complicating the lives of her sister and Stanley Kowalski, her sister’s husband, as she attempts to secure a small, quiet place on earth to call her own. From this mystifying opening, the play begins to illustrate how the two women and the man interact as they attempt to find a peaceful means of co-existence. This is made exceedingly difficult as Blanche cannot accept or understand how Stella might possibly be happy in such surroundings and married to such a ‘common’ brute man. Shortly after her arrival, she is attempting to encourage Stella to run away with her to somewhere nicer, perhaps to the home of an old beau of hers by the name of Shep Huntleigh, who is now a millionaire. It is never determined whether this individual actually existed or would have recognized Blanche had

Visions of Success of Minority Nursing Students Research Paper

Visions of Success of Minority Nursing Students - Research Paper Example o 2001, among the percentage of students graduating in all the nursing programs, the White Americans constituted 45.82%, Hispanics were 19.63%, African American were only 7.76%, and the rest were composed of Filipinos, Asians and other groups (Seago & Spetz, 2005). On the whole, these facts clearly depict that the minority youth’s living standards are worse than the white youth, and that they generally do not chose to adopt the nursing field. This may lead us to the conclusion that the major problem is unavailability of the funds, which hinders the minority students from entering the nursing programs, but that is not true. The hesitation to choose nursing as a career stems from many cultural, racial, as well as biased ideologies possessed by both the students and the academia. On one side, we have minority students, reportedly, considering nursing as a ‘women field,’ and also balking at the idea of studying from a majority white faculty; on the other side, we have NCLEX-RN, allegedly, having ‘white’ influenced exam questions (Seago & Spetz, 2005). No matter what the actuality is, the need for an institution with a culturally accepting attitude, a solid outreach program and a caring faculty cannot be denied. Background and Problem Statement As a part of an investigation carried out to discover the supposed barriers faced by the minority nursing students in central California, seventeen recently graduated registered nurses were thoroughly interviewed (Amaro, Abriam-Yago, & Yoder, 2005). Upon analyzing the result, it was realized that the major perceived barriers by the minority colored youth were the inadequate language competency, insufficient finances and most importantly the biased attitude from the educators. Minority students generally face a lot of... This paper makes the stress that should be towards providing the quality education and other required resources to the students. The college should build networks with other social organizations present within the community to provide the proper help to students in need. This aid can be in the form of counseling and development, financial assistance and advocacy needs. The minority students attending the institution should feel secure and confident every way possible. In the end, it should be remembered that the primary objective is the same as the one set by the American Nurses Association which is to construct a â€Å"diverse workforce† This report makes a conclusion that to determine the effectiveness of the above-mentioned plan, among other approaches, the most useful method will be surveying the teachers and students. To measure the effectiveness of the educators training procedures, it will be hugely constructive to survey the teachers upon completion of the workshops. It will help in determining whether trainees have experienced any change in their outlook or experienced any awareness regarding dealing with minority students. Afterwards, their performance can be measured by surveying their students. The value of outreach program can be determined by interviewing and surveying the high school students. Keeping statistical data of students from different high schools, registering and attending the information sessions, as well as enrolling in the nursing degree will immensely help in providing valuable information to tweak the program. On the whole, the full impact of this plan can be seen by any increase or decr ease in the enrollment of minority students in future semesters.