Mass Transfer
Weeping in a distillation column

Results due to very low gas velocity
Provides large interfacial surface for mass transfer
Results due to very high gas velocity
Increases tray efficiency

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Mass Transfer
Dew point of an air-water vapor mixture

Corresponding to any point on the humidity chart is obtained by projecting a line through this point parallel to the temperature axis and to the saturation curve
Decreases with decrease in pressure
All of the listed here
At constant humidity & total pressure is fixed

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