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20 Cards in this Set
- Front
- Back
energy
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the ability to work or produce heat
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law of conservation of energy
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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
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chemical potential energy
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the energy stored in a substance because of its composition
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heat
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the energy that is in the process of flowing from a warmer object to a cooler object
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calorie
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the amount of heat required to raise the temperature of one gram of pure water by one degree Celsius
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joule
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the SI unit of heat and energy
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specific heat
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the amount of heat required to raise the temperature of one gram of that substance by one degree Celsius
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calorimeter
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an insulated device used for measuring the amount of heat absorbed or released druing a chemical or physical process
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thermochemistry
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the study of heat that accompany chemical reactions and phase changes
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system
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the specific hpart of the universe that contains the reaction or process you wish to study
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surroundings
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everything in the universe other than the system
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universe
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the system plus it's surroundings
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enthalpy
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the heat content of a system at a constant pressure
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thermochemical equation
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a balanced chemical equation that includes the physical states of all reactans and products and the energy change
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enthalpy of reaction
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the change in enthalpy for a reaction
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enthalpy of combustion
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the enthalpy change for the complete burning of one mole of the substance
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molar enthalpy of vaporization
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the heat required the vaporize one molre of a liquid
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molar enthalpy of fusion
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the heat required to melt one mole of a solid substance
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Hess's Law
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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
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standard enthalpy of formation
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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
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