Mass Transfer
Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a

Higher dew point
Higher relative humidity
Higher wet bulb temperature
Higher absolute (specific) humidity

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Mass Transfer
When the liquid phase and vapour phase of a binary system obeys Raoult's and Dalton's law respectively, the relative volatility is the ratio of

Vapour pressure of component A to the partial pressure of A
Partial pressure of component A to the total pressure
Vapour pressure of component A to the total pressure
Vapour pressure of component A to that of component B

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