Mass Transfer
The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or "outgassed" adsorbent to from a definite concentration of adsorbate is called its

Heat of normal condensation
Heat of wetting
Integral heat of adsorption
Differential heat of adsorption

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Mass Transfer
Dew point of an air-water vapor mixture

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

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Mass Transfer
Relative volatility varies with the concentration of component for an ideal solution. The relative volatity of a binary mixture may be defined as the ratio of vapor pressure of component 'A' to that of component 'B', when

Liquid phase obeys Dalton's law and vapor phase obeys Raoult's law
Vapor phase obeys Dalton's law and liquid phase obeys Raoult's law
Only vapor phase follows Raoult's law
Only liquid phase obeys Dalton's law

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