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Thermochemistry
flow of energy
10
Chemistry
9th Grade
05/20/2010

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Term

calorie (cal)

 

Definition
energy in the form of heat that is not food related
Term
Calorie
Definition
energy related to food
Term
Joule
Definition
unit used for energy
Term
exothermic
Definition
processes that releases heat to its surroundings (heat is the product)
Term
endothermic
Definition
process that absorbs heat from its surroundings (heat is reactant)
Term
Molar Heat of Solution
Definition
heat given off or entering a reaction when you add a solid to a liquid----enthalpy change caused by the dissolution of one mole of a substance 
Term
Molar Heat of Fusion
Definition
heat needed to melt or freeze something----the amount of heat absorbed by one mole of a solid substance as it melts to aliquid at a constant room temperature
Term
Calorimeter
Definition
device used to do heat experiments
Term
Enthalpy (H)
Definition
the heat content of a system at constant pressure
Term
Hess's Law of Heat Summation
Definition
calculation of enthalpy for the reaction overall----if you add more than 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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