by Maryam Hussain How does air become humid and dry? When the air remains in contact with a water surface then it gets the vapor from water because of the continuous evaporation of water in the air above it. The extent of the evaporation rate is a function of the vapor pressure of water at the present temperature of the water. When the quantity of vapors of the water in the air is such that the partial pressure of vapors in the air equals the vapor pressure of the water at its existing temperature then an equilibrium is said to be reached between the two pressures and the gas is said to be saturated with this vapor. It is not possible for the air to contain a greater stable concentration of water vapor, because as soon as the vapor pressure of the water is exceeded by the partial pressure of the water vapor, condensation takes place . When the air contains water vapor then it is called moist air or humid air. When the air contains water vapor in such p...
Process Constraints and Optimization, Mass and Energy balances of process, Converters development, Assignments writing.