Mass Transfer
Humidification involves mass transfer between a pure liquid phase and a fixed gas, which is

Soluble in the liquid
Insoluble in the liquid
At a fixed temperature
Non-ideal in nature

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Mass Transfer
In saturated gas, the

None of the listed here
Partial pressure of vapour equals the vapour pressure of the liquid at room temperature
Vapour is in equilibrium with the liquid at the room temperature
Vapour is in equilibrium with the liquid at the gas temperature

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