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IGHS Winkels

Physical Science Chapter 3

TermDefinition
Solid a state of matter in which materials have a definate shape and volume
Liquid a state of matter in which a material has a definite volume, but not a definite shape
Gas a state of matter in which a material has neither shape nor volume
Kinetic Energy the energy an object has due to its motion
Pressure the result of a force distributed over an area
Absolute Zero the temperature of zero K
Charles's Law the volume of a gas is directly proportional to its temperature in kelvins if the pressure & the number of particles of the gas are constant.
Boyle's Law the volume of a gas is inversely proportional to its pressure if the temperature and the number of particles are constant.
Phase Change the reversible physical change that occurs when a substance changes from one state of matter to another
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 Change the system releases energy to its surroundings
Vaporization the phase change in which a substance changes from a liquid into a gas
Heat of Vaporization the energy a substance must absorb in order to change from a liquid to a gas
Evaporation the process that changes a substance from a liquid to a gas at temperatures below the substance's boiling point
Vapor Pressure the pressure caused by the collisions of vapor and the walls of a closed 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 the phase change when a gas or vapor changes directly into a solid without first changing to a liquid
Created by: Winkels
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