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25 terms

FPC States of Matter - Chapter 3

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Absolute Zero
The temperature of 0 Kelvin.
Boiling
Temperature at which the vapor pressure equals atmospheric pressure.
Condensation
A phase change where a substance changes from a gas or vapor to a liquid.
Deposition
When a gas or vapor changes from directly into a solid.
Endothermic
A change where energy is absorbed.
Evaporation
A change of state from liquid to gas below the substance's boiling point.
Exothermic
A change where energy is released.
Freezing
Change of state from a liquid to a solid.
Gas
State of matter in which materials have no definite shape and no definite volume.
Heat of Fusion
The amount of energy required to change 1 gram of a solid to a liquid.
Heat of Vaporization
Amount of energy required to change 1 gram of a liquid into a gas.
Kinetic Energy
Energy of motion.
Liquid
State of matter in which materials have no definite shape, but definite volume.
Melting
Change of state from a solid to a liquid.
Phase Change
A reversible physical change from one state of matter to another.
Pressure
Result of force distributed over an area.
Solid
State of matter in which materials have definite shape and definite volume.
Sublimation
A phase change in which a substance changes from a solid directly to a gas.
Vapor Pressure
Pressure caused by collisions of water vapor with walls of a closed container,
Vaporization
Phase change in which a substance changes from a liquid into a gas.
Kinetic Theory of Gases
Particles in a gas are in constant, random motion. The motion of one particle is unaffected by the motion of other particles. Forces of attraction among particles in a gas can be ignored under ordinary conditions.
Behavior of Liquids
The volume of a liquid is constant because forces of attraction keep the particles close together.
Behavior of Solids
Particles vibrate around a fixed location.
Factors that affect gas pressure
Temperature, volume, number of particles.
Six Common Phase Changes
Melting, freezing, vaporization, condensation, sublimation, and deposition.