Solution: Meteorology. The vapor pressure is the pressure of
Chapter 18, Problem 18.44(choose chapter or problem)
Meteorology. The vapor pressure is the pressure of the vapor phase of a substance when it is in equilibrium with the solid or liquid phase of the substance. The relative humidity is the partial pressure of water vapor in the air divided by the vapor pressure of water at that same temperature, expressed as a percentage. The air is saturated when the humidity is 100%. (a) The vapor pressure of water at 20.0C is 2.34 * 103 Pa. If the air temperature is 20.0C and the relative humidity is 60%, what is the partial pressure of water vapor in the atmosphere (that is, the pressure due to water vapor alone)? (b) Under the conditions of part (a), what is the mass of water in 1.00 m3 of air? (The molar mass of water is 18.0 g>mol. Assume that water vapor can be treated as an ideal gas.)
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