English Essay

English Essay English Essay Question 1: Describe combustion A combustion reaction or also known as burning is an exothermic chemical reaction where a â€Å"fuel† compound is reacted with an oxidant to produce new product of oxide compound and energy which is usually in form of heat and light. During combustion the energy is used, one or more oxides are formed and large of amount of energy is released which can be used to power machine such as cars or burning of coal to run turbines producing electricity. There are two types of combustion, incomplete and complete. Complete combustion occurs when there is plenty of oxygen available and the products are usually carbon dioxide and water. Incomplete combustion occurs when there is less oxygen available; the products usually include carbon (soot) and/or carbon monoxide. Examples of combustion include burning of wood, metals or non-metals in air and hydrocarbons. Complete Combustion examples: 4Na + 3O2 2Na2O3 CH4 + 2O2 CO2 + 2H2O S + O2 SO2 Incomplete combustion examples: 2C + O2 2CO C2H5OH + 2O2 2CO + 3H2O Question 2: According to â€Å"Kinetic theory of matter†, all matter is composed of particles (molecules, atoms, or ions) which are constantly moving. In solids, the particles can only vibrate in one place. In liquids, they are close together, but move around. In gases, they are far apart and flying in all directions. Kinetic energy is the energy an object possesses due to its motion. Temperature is a measure of the average â€Å"KINETIC ENERGY† (rate of motion) of the particles. As the objects are heated up, their temperature increases so does the kinetic energy due to the added heat energy causes the increase in kinetic energy, therefore at higher temperature the particles move faster. Example: When the air inside of air balloon is heated up to 1000C by gas burner, the heat energy is added to make the air inside hot. Because gas molecules are not strongly attracted to each other, they are free to move about. Since the hot air is less dense than cool air as a result by the added heat energy force gas molecules apart and cause them to move faster and make collisions harder resulting in massive expansion of air balloon and it starts to float. If the hot air is let out and cool air enters, the air balloon goes down. Question 3 Explosions are just the uncontrolled fast reactions with a rapid increase in volume and release of energy in extreme manner, usually with generation of high temperature and release of gases. Explosions can occur when there are necessary conditions: 1. Fuel molecules are well mixed with air. 2. Source of ignition (spark, or flame). 3. There is no limit of flow of fuel to combustion area. For example, when a gas leak fills a room the fuel gas is mixed with air, any spark or flame can start reaction that accelerates so fast due to high concentration of gas molecules and oxygen molecules collide vigorously in suitable orientation and with sufficient energy that can break bonds of gas and oxygen to form new bonds, large amount of heat energy released and gas pressure creates a shockwave causing an explosion. Dust explosion is also one of the major explosions. Many materials which are commonly known to oxidise can generate a dust explosion such as coal, magnesium, grain, flour, powdered metals (aluminium and titanium). There are four necessary conditions for a dust explosion: 1. A combustible dust 2. High concentration of dust is suspended in the air 3. There is an oxidant ( typically atmospheric oxygen) 4. Source of ignition For example: coal dust can arise from mining of coals. Large piece of coal is difficult to burn in air. However, accumulation of coal dust suspended in air in an enclosed location can cause an explosion if it comes in contact with source of ignition. Since the dust particles have very large surface area due to English Essay English Essay Zach Martin-Funk Phillip Presswood 20 February 2015 Eng. 104 Wendell Allen Porth July 7, 1953, Colonel Wendell Porth was born†¦a man who lived a life prioritizing but 3 things: his country, his family, and his faith. Born in Davenport, Iowa, he doesn’t have much of a background from there other than it being his â€Å"birth-town† due to the simple fact that his father’s career involved him having to be transferred to different regions throughout the United States. It was a job with the government and his line of work was in the Department of Commerce, so he was transferred quite often. However, no matter how far the job called for him to travel, Wendell or â€Å"Dell† as most people call him, and his family were tagging along too. Dell was the oldest between the two other siblings he had, and for three kids and a wife, that’s a lot of moving to go through. But it wasn’t all so bad. He was raised living in some of the most beautiful states including Utah, California, Hawaii, and eventually Alaska. All that traveling d id pay off in the long run for Dell, because his parents were then able to provide him with an education from Louisiana State University. It wasn’t until college that he decided to come out with his life long dream and chase it†¦and Dell wanted to fly. Based off his opinions he figured, what better way to fly than to do it serving my country? And that is exactly what he did. But, being the man he is, he was going be a leader in whichever branch he chose, meaning he finished school before he joined the military so he could become an officer. As planned he got his degree and was off to flight school for the United States Marine Corps. Wendell Porth was then a U.S Marine pilot. Climbing up in the ranks through the years, he was eventually titled as a Colonel, English Essay English Essay An English essay is a prose composition of moderate length on any given subject, giving expression to one’s personal thoughts or ideas. English essays may narrate or describe some real incident or object; it may give expression to arguments in favour of or against some topic. You may have read many English essays on various English essay topics that are published in magazines or you have read English essays by standard writers, which are of varying lengths, and are specimens of the author’s style in English essay writing. However, English essays expected to be written by school, college and university students or others have certain special characteristics, which are as following: 1. While writing an essay in English, you should all the time keep in mind the subject on which the English essay is being written. The theme of your English composition essay should be unified in a definite way. You should adopt one theme in your English essay while doing English essay writing. You should not add anything in your English language essays that has no direct bearing on the subject. 2. All the thoughts in your English essays must be arranged systematically, leading to a definite conclusion. You should not put your thoughts or ideas in a haphazard way. Your English essays should be in an orderly format. 3. English essays are not usually required to be lengthy. The limit of an English essay is given in the assignment that the teachers hand over to the students. In addition, different topics might require different amount of space. Therefore, the capacity required for an English essay may differ with the subject matter and demand. 4. In friendly letters, you may use an easy conversational style and you may introduce colloquial words or expressions. Such colloquial or slang words and expressions are, however, not to be used in English essays. This does not mean that you should use a grand or flowery language. You language must be correct, clear and simple. It is not advisable to overload your essay with idioms and quotations. Use these when quite necessary. Therefore, your style of writing an English essay should be simple and understandable. 5. A good English essay should reveal the writer’s personality. In an English extended essay, you are to show your personal feelings and opinions. So express your thoughts and ideas freely in your own individual style. Do not copy anybody’s style of writing. Let your style be your own. The steps mentioned above will enable you to write a good English essay. If still, you feel some problem in English essay writing, contact our custom writing service, which provides custom English essays and English sample essays such as ap English essays, college English essays and English 101 essays. Our English essay example and essay on English will help you to write good quality essays by yourself. You can contact us for assistance and support in terms of English essays of any kind and for any topic and we will give you the best essay writing assistance.