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20 Cards in this Set

  • Front
  • Back
energy
the ability to work or produce heat
law of conservation of energy
law that states that in any chemical reaction or physical process, energy can be converted from one form to another, but it is neither created nor destroyed
chemical potential energy
the energy stored in a substance because of its composition
heat
the energy that is in the process of flowing from a warmer object to a cooler object
calorie
the amount of heat required to raise the temperature of one gram of pure water by one degree Celsius
joule
the SI unit of heat and energy
specific heat
the amount of heat required to raise the temperature of one gram of that substance by one degree Celsius
calorimeter
an insulated device used for measuring the amount of heat absorbed or released druing a chemical or physical process
thermochemistry
the study of heat that accompany chemical reactions and phase changes
system
the specific hpart of the universe that contains the reaction or process you wish to study
surroundings
everything in the universe other than the system
universe
the system plus it's surroundings
enthalpy
the heat content of a system at a constant pressure
thermochemical equation
a balanced chemical equation that includes the physical states of all reactans and products and the energy change
enthalpy of reaction
the change in enthalpy for a reaction
enthalpy of combustion
the enthalpy change for the complete burning of one mole of the substance
molar enthalpy of vaporization
the heat required the vaporize one molre of a liquid
molar enthalpy of fusion
the heat required to melt one mole of a solid substance
Hess's Law
law that states if you can add two or more thermochemical equations to produce a final equation for a reaction, then the sum of the enthalpy changes for the individual reactions is the enthalpy change for the final reaction
standard enthalpy of formation
the change in enthalpy that accompanies the formation of one mole of the compound in its standard sate from its constituent elements in their standard states