Vapor Pressure

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Vapor Pressure

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1. The pressure exerted by the molecules of a given vapor. For a pure confined vapor, it is that vapor's pressure on the walls of its containing vessel; and for a vapor mixed with other vapors or gases, it is that vapor's contribution to the total pressure (i.e., its partial pressure). Also called vapor tension. </dd>
In meteorology, vapor pressure is used almost exclusively to denote the partial pressure of water vapor in the atmosphere. See saturation vapor pressure, equilibrium vapor pressure. </dd>
2. The sum of the partial pressures of all the vapors in a system. [[/a>|/a> ]]

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use