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Heat - energy transfer usually due to a
temperature difference |
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Combustion (burning) - a chemical reaction |
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Friction - a mechanical transfer |
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Measuring heat |
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Btu - the amount of heat to change the
temperature of 1 lb of water 1°F |
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calorie - the amount of heat to change the
temperature of 1 g of water 1°C |
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kilocalorie - the amount of heat to change the
temperature of 1 kg of water 1°C |
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Specific Heat Capacity |
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amount of heat required to change the
temperature of a unit mass one degree.
(cal/g C, kcal/kg C or Btu/lb F ) |
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because of the definitions for cal and Btu, the
same values may be used for either English or metric |
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solid to liquid
(fusion) |
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liquid to gas
(vaporization) |
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Assuming no losses or gains to surroundings… |
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conduction - heat transfer from higher temp. to
lower temp. due to molecular interaction |
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convection - heat transfer by mass transfer |
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radiation - heat transfer by waves |
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heat produced per unit of mass of the substance
when it is burned in oxygen ie. Btu/lb |
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calorimeter |
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sublimation |
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evaporation vs vaporization |
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Notes