Thermochemistry Thermochemistry is the study of heat evolved and absorbed during the chemical reactions. The system is the interest of the universe; the surroundings are the rest of the universe in which the exchange of the energy with the system takes place. Both‚ the system and the surroundings make up the universe. Heat flow is the transfer of heat from a warm place to a cooler one. System to surroundings: Surroundings to system:
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Trial 2 | Trial 3 | Trial 4 | Trial 5 | Heat produced by the burning cashew (in cal) | 4720 cal | 4320 cal | 8320 cal | 2480 cal | 1200 cal | Heat produced by 1 gram of cashew (in cal) | 11800 cal | 6171.43 cal | 5942.86 cal | 2755.56 cal | 1714.29 cal | Kilocalories of heat from 1 gram of cashew | 11.80 kcal | 6.17 kcal | 5.94 kcal | 2.76 kcal | 1.71 kcal | Note: All decimal values are approximated to two decimal values. Calculations: The heat produced by the
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Background Information: Heat is energy that transfers from one object to another because of a temperature difference between the objects. Heat is measured in a calorimeter and the units for heat are joules or calories. The calorimeter uses the Law of Conservation of Energy which states that energy is never created or destroyed but is transferred between objects. Temperature is a measure of the average kinetic energy of the particles an object which is different that the heat which is all the energy
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temperature of the water it was boiled in. 70°C 3. What was the specific heat of water in J/g°C? 4.186 J/g°C 4. Using the following equation‚ your answers to questions 1-3‚ and your data table‚ determine the specific heat of the metal sample you tested. 5. Identify you metal using the list of specific heat values provided. The metal that was identified was Zinc. 6. Calculate the percent error in the specific heat value that you determined experimentally. Conclusion: The purpose of
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each of the fuels. The averages were based on five trials. PropanolTheoretical Heat of Reaction: Bonds Broken Bonds Formed Type of Bond Bond Energy (KJ/mole) Number of Bonds Total (KJ/mole) Type of Bond Bond Energy (KJ/mole) Number of Bonds Total (KJ/mole) C-H 412 7 2884 C=O 802 6 4812 C-C 348 2 696 H-O 463 8 3704 O=O 496 5 2480 C-O 366 1 366 O-H 463 1 463 Total 6889 Total 8516 Table 5: Shows the theoretical heat change in enthalpy for Propanol From the above results‚ the theoretical change
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Fenestration as the effective strategies to achieve thermal comfort and reduce heat gain in Phase l of Belum Rainforest Resort‚ Pulau Banding‚ Perak. Asian Architecture [ARC 2213/2234] PROJECT 1: CASE STUDY Fenestration as the effective strategies to achieve thermal comfort and reduce heat gain in Phase l of Belum Rainforest Resort‚ Pulau Banding‚ Perak. NAME: KEE TING TING STUDENT ID: 0310019 LECTURER: MS. SHARIANNE MOHD. SHAH SUBMISSION DATE: 11 NOVEMBER 2014 ARC 2213/2234 Asian Architecture
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The Calorimeters Calorimeters are a device that can measure the heat that comes from burning an item. Simple Calorimeter A simple calorimeter is used to detect the enthalpy change when a fuel is burned. The fuel is burnt to heat a specific mass of water and then measure its rise in temperature. The word calorimeter comes from the Latin phrase calor which means heat. A simple calorimeter just consists of a thermometer attached to a metal container full of water suspended above a combustion chamber
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The role of women in different societies and times in "Heat and Dust" The era of the Victorian women spanned 64 years and concluded several changes in attitudes. The common thinking about women in the Victorian era was that a woman´s position was limited to domestic work and the care for her children. The stereotype of the distribution of roles was women staying by the hearth with their needles whilst men wielded their swords. Women had to bear a large family and to maintain a smooth family atmosphere
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Electric beaters 3 7.2.2 Mincers 3 7.2.3 Liquidisers 3 7.2.4 Blenders 4 7.2.5 Mixers 4 7.2.6 Food processors 4 7.2.7 Ice-cream makers 5 7.3 Food cooking processes 5 7.3.1 Scientific principles and types of heat transference 5 7.3.2 Cooking methods 8 7.3.3 Cooking Devices 14 7.3.4 Industrial devices 18 Food Preparation Technology 1 DRAFT July 2009 7 Food Preparation Technology 7.1 Food preparation techniques When preparing
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P1a 1.1 Thermal Radiation * Thermal or heat radiation is the transfer of energy by infra-red waves. * Thermal radiation is energy transfer by electromagnetic waves. * All objects emit thermal radiation. * The hotter an object‚ the more thermal radiation it emits. * Heat radiation can travel through a vacuum. 1.2 Surfaces and Radiation * Dark‚ matt surfaces are better emitters of thermal radiation than light‚ shiny surfaces. * Dark‚ matt surfaces
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