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Enthalpy changes
vocab and main ideas 17.2
9
Chemistry
11th Grade
05/13/2009

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Term
the precise measurement of heat flow out of a system for chemical and physical processes
Definition
calorimetry
Term
what is equal to the heat released in a a system in calorimetry?
Definition
the heat absorbed
Term
an insulated device used to measure the absoption or release of heat in chemical or physical processes
Definition
calorimeter
Term
the heat content of a system at constant pressure
Definition
enthalpy
Term
what is the enthalpy change writen as in an equation
Definition
a product or a reactant
Term
a chemical equation that includes the enthalpy change
Definition
thermochemical equation
Term
the enthalpy change for a chemical equation exactly as it is written
Definition
heat of reaction
Term
change in H is positive as a product for what kind of reactions?
Definition
endothermic (it takes energy from surroundings)
Term
the heat of reaction for the complete burning of one mole of a substance
Definition
heat of combustion
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