Mass Transfer
When an unsaturated air-water mixture is heated at constant pressure, then

The specific humidity decreases
The relative humidity increases
The relative humidity decreases
The partial pressure of water vapour increases

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Mass Transfer
Inside the distillation column, the

Liquids are not always at their bubble points
Pressure increases gradually from bottom to the top of the column
None of these
Driving force for the vapour flow is the pressure drop

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Mass Transfer
When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system,

The distribution curve which is a plot between x (acetone concentration in one phase) and y (acetone concentration in other phase) is analogous to x-y curve used in distillation and absorption termina
All of these
As the acetone concentration increases, the solubility curves approach each other
Both the phases become identical at a particular common point on both the solubility curves called the plait point

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