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21 Cards in this Set
- Front
- Back
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Molar Heat of COndensation
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the amount of heat released by one mole of a vapor as it condenses to a liquid at constant temperature
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Molar heat of fusion
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the maount of heat absorbed by one mole of a solid substance as it melts to a liquid at a constant temperature
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Molar heat of solidfication
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the amount of heat lost by one mole of liquid as it solidifies at a constant temperature
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Molar head of solution
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the enthalpy change caused by the dissolution of a liquid as it solidfies at a constant temperature
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specific heat
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the amount of heat needed to increase the temperature of 1g of a substance 1degreesC; also called specific heat capacity
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specific heat of formation
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the charge in enthalpy that accompanies the formation of one mole of a compound from its elements with all substances in their standard states 25degreesC
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Surroundings
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Everything in the universe outside of the system
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system
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a part of the universe on which you focus your attention
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thermochemical equation
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a chemical equation that includes the enthalpy change
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thermochemistry
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the study of energy changes that occur during chemical reactions and changes in state
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calorimeter
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the insulated device used to measure the absorption or release of heat in chemical or physical processes
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calorimetry
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the precise measurement of the heat flow into or out of a system for a chemical and physical processes. the heat released by the system is equal to the heat absorbed by its surroundings
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Chemical potential energy
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the energy stored in the chemical bonds
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Enthalpy
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heat content of a system at a constant pressure. the heat released or absorbed by a reaction at a constant preasure
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exothermic process
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process that releases heat to its surroundings. the system loses heat as the surroundings heat up
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heat
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energy that transfers from one object to another because of a temperature difference between the objects
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heat capacity
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the amount of heat needed to increase the temperature of an object exactly 1degreesC
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heat of cumbustion
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the heat of reaction for the complete buring of one mole of a substance
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heat of reaction
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the enthalpy change for a chemical equation exactly as it is written
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Hess' law of heat summation
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if you add two or more thermochemical equations to give a final equation, then you also add the heats of reaction to give the final heat of reaction
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law of conservation of energy
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in any chemical change or physical process, energy is neither created nor destroyed
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