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Phase changes 3.3

Vocab words

QuestionAnswer
Phase change Is the reversible physical change that occurs when a substance changes from one state of matter to another.
Endothermic During an endothermic change the system absorbs energy from its surroundings.
Heat of fusion The energy a substance must absorb in order to change from a solid to a liquid.
Exothermic During an exothermic change, the system releases energy to its surroundings.
Vaporization The phase change in which a substance changes from a liquid into a gas is vaporization.
Heat of vaporization The energy a substance must absorb in order to change from a liquid to a gas.
Evaporation Evaporation is the process that changes a substance from a liquid to a gas at temperature below the substances boiling point.
Vapor pressure The pressure caused by those collisions of this vapor and the walls of the container is called vapor pressure.
Condensation Condensation is a phase change in which a substance changes from a gas or vapor to a liquid.
Sublimation Sublimation is the phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first.
Deposition When a gas or vapor changes directly into a solid without first changing to a liquid, the phase change is called deposition.
Created by: bfehan
 

 



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