Difference between revisions of "Vapor pressure"
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| − | + | '''Vapor pressure''' is the [[pressure]] exerted by a vapor in a vapor-liquid [[equilibrium]] in a closed vessel. The relationship between a pure substance's vapor pressure and its [[temperature]] is shown on the liquid-vapor line on a [[phase diagram]]; the vapor pressure always increases as the temperature increases. <ref name="atkins">Atkins, Peter and Julio de Paula. ''Physical Chemistry Volume 1, 8e.'' Oxford University Press: 2006.</ref> | |
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| + | When the pressure on a system is equal to the vapor pressure of a substance, that substance is considered [[boiling]]. Thus, the [[normal boiling temperature]] is defined as the the temperature at which a substances vapor pressure equals 1 [[atmosphere]]. | ||
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| + | ==See Also== | ||
| + | *[[Phase diagram]] | ||
==References== | ==References== | ||
Revision as of 20:18, September 29, 2007
Vapor pressure is the pressure exerted by a vapor in a vapor-liquid equilibrium in a closed vessel. The relationship between a pure substance's vapor pressure and its temperature is shown on the liquid-vapor line on a phase diagram; the vapor pressure always increases as the temperature increases. [1]
When the pressure on a system is equal to the vapor pressure of a substance, that substance is considered boiling. Thus, the normal boiling temperature is defined as the the temperature at which a substances vapor pressure equals 1 atmosphere.
See Also
References
- ↑ Atkins, Peter and Julio de Paula. Physical Chemistry Volume 1, 8e. Oxford University Press: 2006.
