| 1. | vapor pressure. |
| 2. | the maximum vapor pressure possible, at a given temperature, in a system composed of a liquid or solid substance in contact with the vapor of that substance. |
| the pressure exerted by the molecules of a vapor, esp. that part of the total pressure exerted by vapor in a mixture of gases, as by water vapor in air. |
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.
vapor pressure
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