9.3. VAPOR PRESSURE OF WATER AND HUMIDITY
9.3A. Vapor Pressure of Water
In a number of the separation processes and transport processes, it is necessary to make calculations involving the properties of mixtures of water vapor and air. These calculations involve knowledge of the concentration of water vapor in air under various conditions of temperature and pressure, the thermal properties of these mixtures, and the changes occurring when these mixtures are brought into contact with water or with wet solids in drying.
Humidification involves the transfer of water from the liquid phase into a gaseous mixture of air and water vapor. Dehumidification involves the reverse transfer, whereby water vapor is transferred from the vapor ...
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