Properties of gases


In a gas, the atoms or molecules are free to move about rapidly. Collisions with the walls of the container give rise to gas pressure.

Because the atoms or molecules of a gas are far apart and move independently of each other, a gas can be expanded or compressed to a much greater degree than can a solid or a liquid. Changes in volume are accompanied by changes in pressure and/or temperature.

These changes can be explained in terms of the kinetic theory of gases and the gas laws.

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