Humid air at 32 °C , 760 mmHg and 80 % relative humidity is fed to a cooling chamber at constant pressure to condense some of the water vapor out of the humid air. The exit air leaves at 4 °C, 760 mm Hg and 100% relative

humidity. If the lquid condensate flows at a rate of 4 kg/h. Calculate the feed rate of humid air in SCMH?

Vapor pressures of water at 32 °C and 4 °C are 35.7 mm Hg and 6.1 mm Hg respectively. Treat air as a mixture of two components: dry air and water vapor.