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vapor pressure
noun
- the pressure exerted by the molecules of a vapor, especially that part of the total pressure exerted by vapor in a mixture of gases, as by water vapor in air.
vapor pressure
- The pressure exerted by a vapor on the solid or liquid phase with which it is in equilibrium. At pressures lower than the vapor pressure, more atoms or molecules of the liquid or solid vaporize and escape from the surface of the liquid or solid than are absorbed from the vapor, resulting in evaporation. At the vapor pressure the exchange is equal and there is no net evaporation.
- Also called evaporation pressure
- The pressure exerted by water vapor in the atmosphere.
vapor pressure
- In physics and chemistry , the atmospheric pressure that would be exerted by any single component of a gas if that component were the only one present. For example, the vapor pressure of oxygen in the atmosphere of the Earth is the pressure that would exist if everything but oxygen were removed. The total atmospheric pressure is the sum of the vapor pressures of all the materials in the atmosphere.
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Word History and Origins
Origin of vapor pressure1
Probably earlier than 1895–1900
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Example Sentences
The relative humidity is simply the ratio of the vapor pressure at the dew point to the pressure of saturated vapor (see Fig. 30).
From Project Gutenberg
Another factor contributing to the ease of handling of 1,2-butylene oxide is its vapor pressure.
From Project Gutenberg
Nearness to a coast does not mean uniform vapor pressure, for with wind alternating from sea to land, it means just the opposite.
From Project Gutenberg
Let me first repeat that evaporation increases with increased air currents and with decreased vapor pressure.
From Project Gutenberg
Now, the vapor pressure undergoes all manner of changes with the passing of storm centers and the changes of prevailing winds.
From Project Gutenberg
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