Mass Transfer
Dew point of an air-water vapor mixture

At constant humidity & total pressure is fixed
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
All of the listed here
Decreases with decrease in pressure

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Mass Transfer
Molecular diffusion is caused by the

Activation energy of the molecules
Potential energy of the molecules
Transfer of molecules from low concentration to high concentration region
Thermal energy of the molecules

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