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21 Cards in this Set

  • Front
  • Back
Molar Heat of COndensation
the amount of heat released by one mole of a vapor as it condenses to a liquid at constant temperature
Molar heat of fusion
the maount of heat absorbed by one mole of a solid substance as it melts to a liquid at a constant temperature
Molar heat of solidfication
the amount of heat lost by one mole of liquid as it solidifies at a constant temperature
Molar head of solution
the enthalpy change caused by the dissolution of a liquid as it solidfies at a constant temperature
specific heat
the amount of heat needed to increase the temperature of 1g of a substance 1degreesC; also called specific heat capacity
specific heat of formation
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
Everything in the universe outside of the system
a part of the universe on which you focus your attention
thermochemical equation
a chemical equation that includes the enthalpy change
the study of energy changes that occur during chemical reactions and changes in state
the insulated device used to measure the absorption or release of heat in chemical or physical processes
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
Chemical potential energy
the energy stored in the chemical bonds
heat content of a system at a constant pressure. the heat released or absorbed by a reaction at a constant preasure
exothermic process
process that releases heat to its surroundings. the system loses heat as the surroundings heat up
energy that transfers from one object to another because of a temperature difference between the objects
heat capacity
the amount of heat needed to increase the temperature of an object exactly 1degreesC
heat of cumbustion
the heat of reaction for the complete buring of one mole of a substance
heat of reaction
the enthalpy change for a chemical equation exactly as it is written
Hess' law of heat summation
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
law of conservation of energy
in any chemical change or physical process, energy is neither created nor destroyed