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Unit 5 Vocab

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.

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-exists.  
Critical Point   Where substance indicates the critical temperature and critical pressure.  
Molar Enthalpy of Fusion   The amount of energy required to 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   Particles are in constant motion  
Molar Enthalpy of Vaporization   The amount of energy as heat needed to vaporize one mole of a liquid  
∆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  


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Created by: angel.williams