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GASES:
The particles in a gas are considered to be small, hard spheres with an insignificant volume
The motion of the particles in a gas is rapid, constant, and random
Gas pressure is the result of simultaneous collisions of billions of rapidly moving particles in a gas with an object
All collisions between particles in a gas are perfectly elastic
Gas pressure results from the force extered by a gas per unit surface area of an object
The phase change form a liquid to gas is vaporization , but the phase change from a gas to a liquid is condensation.
Deposition is the conversion of a gas to a solid, while sublimation is the conversion betwieen a solid and a gas.
Atmospheric pressure results from the collisions of atoms and molecules in air with ojects. Atmospheric pressure decrease with altitude.
