Heat of Combustion Lab Essay Example for Free

Heat of Combustion Lab Essay There are many fuels in the world and we use fuel everyday in our life. However some fuels are very useful and some are not. Usually useful fuel means the fuel that is very efficient in a small amount. To know the efficiency of each material, we measured the changes of mass and temperature when we burn them. And we calculated changing energy by using the equation that we learned in the class by using our measurements. And we calculated the heat of combustion to know the efficiency of the material. We also used the data booklet value for the standard enthalpy of combustion of each material to get the errors in our experiment. Errors in our experiment were usually over 20 percent which is quite large. Before we heated the water, we made the temperature of water below than 10à ¯Ã‚ ¿Ã‚ ½C with ice to see the changes of temperature more efficiently. If we just heated it in normal temperature such as 20à ¯Ã‚ ¿Ã‚ ½C, we couldnt see the changes of temperature well, and it could take more time to heat it. We also measure the changes of mass of material to see how much we burned. We put some ice in the water to make the initial temperature of water as lower than 10à ¯Ã‚ ¿Ã‚ ½C. When the temperature decreased up to 10à ¯Ã‚ ¿Ã‚ ½C, we took out ice from the water. After we took out the ice and fill the cylinder up to 200ml of water, the temperature was higher than 10à ¯Ã‚ ¿Ã‚ ½C because the temperature of the water changed very quickly. We measured the temperature of water and then we hang the tin can on the hanger, so the temperature might increased again during we set up all the experiment systems. So we should measure the temperature of water when we set up all the things. For example we should measure it after we turn the light on the candle wax and hang the tin can on the hanger. We measured the final temperature to see the changes of the temperature. We blew out the candle when the temperature reaches 35à ¯Ã‚ ¿Ã‚ ½C, and we measured the highest temperature reached as the final temperature. When the temperature reaches 35à ¯Ã‚ ¿Ã‚ ½C, we quickly blew out the candle. However we are not accurate as the machine so we might didnt blow out it when it reaches exactly 35à ¯Ã‚ ¿Ã‚ ½C. Also it was difficult to measure the highest temperature of it after we blow it out. Even though we kept watching it, the temperature changes so quickly, so our measurements are not correct 100%. In our experiment we didnt measure the mass of tin can. If we measure the mass of it, we could get more precise measurement compare to the standard enthalpy of combustion. Our errors are quite large, so I think one of reason is that we forgot the measure the mass of tin. So we should study and think more about the experiment before we do it. We could calculate how much heat we got by adding the changing energy of water and the changing energy of the tin can, if we measured the mass of can. At the end of the experiment, we measured the mass of candle to know how much of them were burned. During and after we blow out the candle, some of liquid were might evaporated. Such as ethanol and butanol are volatile liquid, and the fact that the lamp was hot indicates that some of it would have evaporated. So they are burned and evaporated more after we measure the temperature. Another fact that we should consider is that not only the water was being heated, but also the thermometer, stirring rod and the tin can were also being heated. We should consider that they were also heated, so we should measure how much heat were used to heat them. Also some other heat would have been lost round the sides of the tin can, and from the water to the atmosphere. Due to our room temperature are different from the temperature of water. The good thing that we did in our experiment is that we made some space when we set up the large metal can to surround the candle. As we make some space under the large can by putting some flat cylinder under the can, the candle burned more quickly and well. If we didnt make the space for it, air might stuck in there so it would take more time to reaches up to 35à ¯Ã‚ ¿Ã‚ ½C.

Benjamin Franklin :: American History

Benjamin Franklin Benjamin Franklin has influenced American technology, and indirectly, lifestyles by using his proficiencies and intelligence to conduct numerous experiments, arrive at theories, and produce several inventions. Franklin's scientific and analytical mind enabled him to generate many long lasting achievements which contributed to the development and refinement of modern technology. Few national heroes, including George Washington and Thomas Jefferson, played a more significant role in shaping the American way of life than Franklin. According to Fowler, "He personified the ideal of the self-made man, and his rise from obscurity to eminence exemplified the American dream" (32). Looby adds, "The study of Franklin's image for the past two centuries shows that his legacy had a distinctive place in American culture" (85). It has been felt by many people over the years that there was no United States inventor as great as Franklin until the time of Thomas A. Edison (Blow 24). Franklin's words to a friend in Pennsylvania, Joseph Huey, best explain his attitude not only toward what he considered his civic duties, but also his investigations as a scientist or philosopher. He made some of the most famous and certainly the most practical discoveries of his time. "For my own part, when I am employed in serving others, I do not look upon myself as conferring favours, but as paying debts. In my travels, and since my settlement, I have received much kindness from men, to whom I shall never have any opportunity of making the least direct return . . . I can therefore only return on their fellow men; and I can only show my gratitude for these mercies from God, by a readiness to help his other children and my Brethren" (Dineen 6). Wright quotes Franklin as saying, "As we enjoy great advantages from the inventions of others," and, "we should be glad of an opportunity to serve others by any invention of ours" (19). Franklin summarizes his attitude toward his inventions by asking the question, "What signifies Philosophy that does not apply to some use?" (Fleming 21). Another time Franklin is quoted as saying, "Utility is in my opinion the test of value in matters of invention, and that a discovery which can be applied to no use, or is not good for something is good for nothing" (Burlingame 39). Franklin never claimed a penny for any of his inventions, devices or experiments. He even distributed detailed plans of some of his inventions so that anyone could own them.

Research Paper on Being a Doctor

Introduction: A flame sparked a passion early in my life a desire to become a surgeon. My first exposure to the medical field was when I visited my aunt in her residency in Venezuela. â€Å"A surgeon is responsible for the success of his scheduled surgeries. He’s a leader who coordinates each operation with a highly qualified staff, assesses the patient’s need for surgery and is in charge of his post op recovery (Baylor). † A surgeon possesses qualities above those of a general physician, requiring years of additional schooling.Few choose this path and I hope one day I will succeed in reaching my ultimate goal and to also be able to help people. [pic] Research Process: The career cluster choices offered were business management, construction and health sciences which is the one that captured my attention because a surgeon fits in that category. I was excited because I got to write about something in which I was passionate. My research was primarily based on expan ding my knowledge and getting a deeper insight into the medical career of a surgeon and how to arrive at this destination, which the career cluster helped clarify.The next step was to locate the right person of prominence in the field. Although difficult, my pediatrician helped me find the him. Dr. Schierling is a general surgeon working with the Medical Clinic of North Texas. Knowing that surgeons have many responsibilities, I knew that contacting him early was necessary as well as having back up surgeons. I developed my interview in a thoughtful and detailed manner covering all the requirements making sure I had the right information to write a detailed and informative paper.I sent the interview by email Wednesday and first received his response on Sunday, learning the importance of backups and contacting people early. Dr. Schierling’s information was exactly what I was looking for; helpful and detailed information which really helped me develop my knowledge about the medic al field. Job Specifics: To become a doctor the path is long and hard. Under normal circumstances you need a four year degree in any university. You can major in anything you want, â€Å"but at least two years of you college experience will be trying to build up your prerequisite credits for med school.It is better if you major in English or science as it will be easier to meet those credits(Schierling)†. In the charts below are the ACT and SAT scores for acceptance into Southwestern University as well as class rank for acceptance. This is one of the thousand universities that offer a four year degree. To get more requirements and learn more about this university you should visit the Southwestern website. First-Year Acceptance Rates By Class Rank (2010) CLASS RANK | |185 students enrolled | |Average undergraduate GPA: 3. 8 | |Average MCAT scores: 11. 15 ( out of a 15 point scale) | Remember that it is not imperative to go to a prestigious med school to be successful (Schie rling)†. â€Å"After Medical School you will apply for residency in surgery in one of the thousands of hospitals across the country. Then after you are matched to a residency program you move to the state and get a license to practice medicine which takes about one year. Residency for surgery is usually five years, then if you want to do a sub specialization it can take about one to two years in a fellowship(Schierling). † While you do your residency you earn about 35,000-41,000 dollars, depending on the area.After you are a surgeon and depending on your specialty your salary can vary from 258,000-700,000 dollars. Hours, traveling and even dress are flexible after med school. â€Å"You also have to remember that surgeons are few and they are always in constant demand. Below are some statistics for job outlooks from the â€Å"Bureau of Labor Statistics†: Occupational Title |SOC Code |Employment, 2008 |Projected Employment, 2018 |Change, 2008-18 | | | | | |Number |Percent | |Physicians and surgeons |29-1060 |661,400 |805,500 |144,100 |22 | |Another important responsibility of a surgeon is to be a good businessman. Thinking of the patient’s ability to pay for care always needs to be taken into consideration. â€Å"This brings long hours and a difficult quality of life if you have a family, but the patient always needs to come first. A surgeon’s work week generally consists of a few days in the operating room, some days of patient evaluation and post op care. They also cover emergency calls and sometimes you are on call late at night; loss of sleep and not having the time to eat are normal.Surgeons have opportunities to attain higher positions within the hospital community; chief or head of certain departments. These positions are more managerial and can redefine your role to more leadership and less clinical care. This is a decision that every surgeon needs to make early on in his career. (Schierling)† [pic] Reflection: T he I-Search project was very eye opening and educational. This really encouraged me to start preparing to be more knowledgeable in my subject and choice of university and education.I now understand the surgeon’s general work days and the path to get there. I had the opportunity to meet people in the career field in which I was interested. I also learned about possible secondary career choices such as business management in the health care industry and the career possibilities related to managing a hospital. I discovered that while studying medicine you can also get a secondary degree such as a PHD or an MBA. The survey, therefore did manage to cover a specific interest of mine and it also opened other possibilities.I also learned that to be a doctor â€Å" you have to have good studying an organizational skills to manage all the rigorous training required as well as honesty and a good work ethic. Looking back at all the work I did put into this paper, I would only change one thing. I would have been more organized with my time. A time line would have helped me better approach all this work. This experience will help me in the future by having given me the necessary tools to complete bigger complex projects in an organized manner.

Assessment Of Community Level Barriers - 1460 Words

Assessment of Community-Level Barriers Every community has barriers to success, it is the duty of its members to find a way to break those barriers and succeed at helping the members in the that community. â€Å"A community assessment is basically a description of a community and its people. The purpose is to identify the needs of a community in order to provide services appropriate to those needs.† (nnlm.gov,2016) Building off the plan and goals set for the model program I created this paper will evaluate the critical barriers that risk the success of the program. ‘Moving Up’ is a program to offer services in alcohol and drug rehabilitation. The vision for this program is to create a clinic/medical office that offers every service a person could need to fight and win against substance abuse addiction. The goal of Moving Up is to service the entire community in one location. Moving Up will have the ability to complete full medical evaluations, full mental health assessment, and social service assessmen t. The ideal situation is not for the program to turn anyone away who needs our care. The majority of funding comes from local charity. In addition, the program applies for federally funded grants but those are not guaranteed. Once an initial full evaluation is done on each patient Moving Up can create a program designed specifically for the needs of that community member. Each day the clinic will offer several different meetings and classes. We will offer classes on addiction,Show MoreRelatedEssay On Community Based Wellness Program1659 Words   |  7 PagesInstitutional Review Board at the University of Mary. The community-based wellness program was designed by the researchers based on current literature on the effectiveness of such programs with the PD population. 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