Vapor

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

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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.

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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.

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US English: REDIRECT American English...

British English: British English (BrE) is a term used loosely to refer to the form of the English language written in the British Isles, and more narrowly as spoken in the south of England (extending elsewhere with varying degrees). For historical reasons dating back to the rise of London in the 9th century, the var...

Gas: :For other meanings see gas (disambiguation)....