Vapor

Vapor (US English) or vapour (British English) is the gaseous state of matter.

Related Topics:
US English - British English - Gas

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Although vapor and gas are frequently used interchangeably, vapor often carries the connotation of gaseous matter in a state of equilibrium with identical matter in a liquid or solid state below its boiling point. See the entry on vapor pressure for more information on this topic.

Related Topics:
Equilibrium - Liquid - Solid - Boiling point - Vapor pressure

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The constituent atoms or molecules of a vapor possess vibrational, rotational, and translational motion. More information can be found under the entry of the Kinetic theory of gases.

Related Topics:
Atom - Molecule - Kinetic theory of gases

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