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Chapter 3
Vocabulary.
| Question | Answer |
|---|---|
| solid | state of matter in which materials have a definite shape & volume |
| liquid | state of matter in which a material has a definite volume but not a definite shape |
| gas | state of matter in which a material has neither a definite shape nor a definite volume |
| kinetic energy | the energy an object has due to its motion |
| phase change | the reversible physical change that occur when a substance changes from one state of matter to another |
| endothermic | the system absorbs energy from its surroundings |
| heat of fusion | the amount of energy absorbed depends on the substance1 |
| exothermic | the system releases energy to its surroundings |
| vaporization | the phase change in which a substance changes from liquid to a gas |
| heat of vaporization | a substance must absorb energy in order to change from liquid to gas |
| evaporation | the process that changes a substance from a liquid to a gas at temperatures below the substances boiling point |
| vapor pressure | the pressure caused by the collisions of this vapor and the walls of the container |
| condensation | the phase change in which a substance changes from a gas or vapor to a liquid |
| sublimation | 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:
sascha.holt
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