Semester 1 Final- Unit 4 Vocab
Terms
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- 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