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27 Cards in this Set

  • Front
  • Back
concerned with the heat changes that occur during chemical reactions
the capacity for doing work or supplying heat
energy stored within the structural units of chemical substances
chemical potential energy
represented by q, the energy that transfers from one object to another bcause of a temperature difference between them
the part of the universe on which you focus your attention
include everything else in the universe
the system and its surroundings constitute the
states that in any chemical or physical process energy is neither created nor destroyed
law of conservation of energy
a process that absorbs heat from the surroundings is called an
endothermic process
a process that releases heat to its surroundings is called an
exothermic process
defined as the quantity of heat needed to raise the temperature of 1 g of pure water 1*C
the SI unit of heat and energy named after an English physicist
the amount of heat needed to increase the temperature of an object exacty 1*C
heat capacity
the amount of heat it takes to raise the temperature of 1 g of the substance 1*C
specific heat capacity
specific heat
the accurate and precise measurement of heat chnage for chemical and physical processes
the insulated device used to measure the absorption or release of heat in chemical or physical processes
the heat content is the same as this property

a variable that takes constant pressure into account
an equation that includes the heat change
thermochemical equation
the heat change for the equation exactly as it is written
heat of reaction
the heat of reaction for the complete burning of one mole of a substance
heat of combustion
the heat absorbed by one mole of a substance in melting from a solid to a liquid at constant temperature
molar heat of fusion
the heat lost when one mole of a liquid solidifies at a constant temperature
molar heat of soidification
the amount of heat necessary to vaporize one mole of a given liquid
molar heat of vaporization
the amount of heat released when 1 mol of vapor condenses
molar heat of condensation
the heat change aused by dissolution of one mole of substance
molar heat of solution
if you add two or more thermochemical equations to give a final equation, then you can also add the heats of reaction to give the final heat of reaction
Hess's law of heat summation
the change in enthalpy that accompanies the formation of one mole of a compound from its elements with all substances in their standard states at 25*C
standard heat of formation