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Unit 5
Chemistry
| Term | Definition |
|---|---|
| Phase Diagram | a graph of pressure and temperature that shows the conditions under which a substance exists |
| STP | Standard Temperature and Pressure |
| Triple Point | the temperature and pressure at which the solid, liquid, and gas phases co-exist |
| Critical Point | where substance indicates the critical temperature and critical pressure |
| Molar Enthalpy of Fusion | the amount of energy required o melt one mole of a solid |
| Nonvolatile | Liquids that do not evaporate readily because of strong attractive forces between particles |
| Deposition | the change of a gas directly to a solid |
| Sublimation | the change of a solid directly to a gas |
| Kinetic Molecular Theory | paricles are in constant motion |
| Molar Enthalpy of Vaporization | the amount of energy as heat needed to vaporize one mole of a liquid |
| (triangle)H | enthalpy of products - enthalpy of reactants |
| Hess' Law | overall enthalpy change in a reaction is equal to the sum of the enthalpy changes for the individual steps in the process |
| Endothermic | heat energy is absorbed; products higher |
| Exothermic | heat energy released; products lower |
| Enthalpy Change | using Hess' law; process equals the sum of the energy difference of products minus the sum of the energy difference of the reactants |
Created by:
catelyn.orendi