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sect 3.3

phase changes

QuestionAnswer
what are 6 common phase changes? melting, freezing, vaporization, condensation, sublimation, and deposition.
what is endothermic? when a system absorbs energy from its surroundings.
what is the heat of fusion? the temp at which it melts.
what is exothermic? when releases energy into its surroundings.
what is vaporization? when a substance changes from a liquid into a gas.
what is heat of vaporization? the amount of energy for water.
what is evaporation? the process that changes a stubstance from a liquid to a gas at temperatures below the substances boiling point.
what is vapor pressure? the pressure caused by the collisions of this vapor and the walls of the container.
what is condensation? when a substance changes from a gas or vapor to a liquid.
what is sublimation? a substance changes from a solid to a gas or vapor without changing to a liquid first.
what is deposition? when a gas or vapor changes directly into a solid without first changing to a liquid.
Created by: MG98
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