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Meaning of VAPOR PRESSURE

Pronunciation:  'veypur 'preshur

WordNet Dictionary
 
 Definition: [n]  the pressure exerted by a vapor; often understood to mean saturated vapor pressure (the vapor pressure of a vapor in contact with its liquid form)
 
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 Synonyms: vapour pressure
 
 See Also: force per unit area, pressure, pressure level

 

 

Webster's 1913 Dictionary
 
 Definition: 
\Vapor pressure\ or tension \tension\ . (Physics)
The pressure or tension of a confined body of vapor. The
pressure of a given saturated vapor is a function of the
temperature only, and may be measured by introducing a small
quantity of the substance into a barometer and noting the
depression of the column of mercury.
 
Biology Dictionary
 
 Definition: The amount of pressure which is exerted by the vapor phase of a liquid that has undergone some evaporation. When the rate of evaporation of the liquid into the vapor phase and the rate of condensation of the vapor back into the liquid phase are equal, the amount of pressure is called the "equilibrium vapor pressure." A liquid which has no measurable vapor pressure (and barely evaporates) is "nonvolatile." Vapor pressure (and volatility) increases with increasing temperature.
 

 

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