Heat of Combustion Questions 1. When bonds are broken‚ energy is required. When bond are formed‚ energy is released. All combustion reactions are exothermic. Suggest a reason for this in terms of the bonds broken and bonds formed. The energy required to break the bonds is greater than the energy required to form. 2. Explain why the heat of combustion of alkanols increases as the length of the carbon chain increases. The heat of combustion of alkanol increases as the length of carbon chain
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Heat energy Temperature – measure of the average KE of the particles in a substance‚ measured in degrees Celsius or degrees Kelvin. Celsius 0⁰C (freezing point of water) to 100⁰C (boiling point of water) Kelvin 0 K (absolute zero‚ particles stop moving theoretically)‚ equivalent to -273.15⁰C. Uses the same scale for increase‚ ie. a 1⁰C increase in temperature equates to a 1K increase in temperature. Heat – amount of energy transferred‚ measured in Joules (J) Kinetic Energy‚ Thermal
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ANALYSIS On the first part of the experiment which is the determination of specific heat of metals. The obtained value of experimental specific heat of metal of aluminum and copper are 0.2152 calg-℃ and 0.0958 cal g-℃ ‚ respectively. It is a must to work faster in performing this experiment because working in an air-conditioned room greatly affects the result of the temperature. For the temperature values‚ the final temperature of mixture should not increase more than 1 ℃ compare
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vibrating around‚ the hotter the object feels. We can sidestep this molecular picture by dealing with objects as a whole‚ and treating the energy transfer as the flow of heat‚ rather than kinetic energy transfer among particles. |Specific Heat for Various Materials | |Material |Specific Heat | | |(J/kg C°) | |Water |4186 | |Aluminum |900
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October 27‚ 2013 The Yellow Followers These followers are yellow little cylindrical creatures who have one or two eyes. Some are tall‚ some are short‚ some have hair and others don’t. Many of them are thin‚ and many are round in shape. Most of these little creatures are dressed the same way. They are dressed in blue apparel with an emblem in the middle. Wearing gray metal circles around their eyes to help with their visions. They are indestructible and almost superhero like. They can survive without
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Introduction- Heat is energy that is warm. Heat energy comes from different energy forms or types like electrical. Heat is also natural‚ from the sun. Heat transforms by reflecting on something and giving it warmth. The temperatures on the coloured cans will vary because they absorb different amounts of heat. According to the particle theory when an object heats up the particles spread out and move more. Aim- The aim of this experiment is to test how colour affects the amount of heat being absorbed
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1) What was meant by the term "the earths heat budget" (5) The Earth’s Heat Budget Solar Insolation - The primary source of energy to drive our global climate system (including atmospheric and‚ to a lesser extent‚ oceanic circulation) is the heat we receive from the Sun‚ termed solar insolation. The spectrum of light which comes from the Sun is shown above. The spectrum of light in the atmosphere and at the Earth’s surface is shown below. Insolation arrives at the edge of our atmosphere primarily
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Chemistry – Heats of combustion. To determine the heats of combustion of selected alkanols and to use this information to determine the heat of combustion for a longer chain alkanols. Formula ΔH=-mCΔT Heat of combustion ΔH/n = molar heat of combustion. Materials -100 degrees thermometer -glass stirring rod -aluminium beaker -electronic balance -bosshead and clamp -retort stand Method 1) Set up the apparatus as shown above. 2) Measure the weight of aluminium can 3) Use the
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In The Heat Of The Night can be read as a mystery story for few people‚ but others would simply read it as an underlying racial issue. In general opinion‚ this novel is both a mystery story and an underlying racial issue. These statements will be discussed in details: When local police officer Sam Wood found Virgil Tibbs waiting for the train‚ he swiftly takes him into custody where he was questioned about a murder. The mystery is shown by the literary point of view used in In the Heat of the Night
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humanitarian‚ decent country‚” said Mr. John Howard back in 2001‚ this statement was coincidentally made during the time in which 438 Afghan asylum seekers were refused permission to enter Australian waters. Arriving in a cargo vessel‚ the MV Tampa‚ after almost sinking in an Indonesian boat‚ the captain of the Tampa claimed that he had saved the asylum seekers’ lives at the request of the Australian Search and Rescue authorities‚ so why was it that the Tampa was told to turn back? Obviously‚ we don’t
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