| Term | Definition |
|---|
| solid | state of matter in which materials have definite shape & definite volume |
| liquid | state of matter in which materials have no definite shape, but definite volume |
| gas | state of matter in which materials have no definite shape & no definite volume |
| kinetic energy | energy of motion |
| pressure | result of force distributed over an area |
| absolute zero | the temperature of 0 Kelvin |
| Charles's Law | volume of gas is directly proportional to its temperature when pressure is constant |
| Boyle's Law | volume of gas is inversely proportional to its pressure when temperature is constant |
| phase change | a reversible physical change from one state of matter to another |
| endothermic | a change where energy is absorbed |
| heat of fusion | the amount of energy required to change 1 g of a solid to a liquid |
| exothermic | a change where energy is released |
| vaporization | phase change in which a substance changes from a liquid into a gas |
| heat of vaporization | amount of energy required to change 1 g of a liquid into a gas |
| evaporation | change of state from liquid to gas below the substance's boiling point |
| vapor pressure | pressure caused by collisions of water vapor with walls of closed contatiner |
| condensation | a phase change where a substance changes from a gas or vapor to a liquid |
| sublimation | a phase change in which a substance changes from a solid directly to a gas |
| deposition | when a gas or vapor changes from directly into a solid |
| melting | change of state from a solid to a liquid |
| freezing | change of state from a liquid to a solid |
| boiling | temperature at which the vapor pressure equals atmospheric pressure |
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