Mass Transfer
The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the

Heat of wetting
None of these
Integral heat of adsorption
Differential heat of adsorption

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Mass Transfer
Steam distillation is used to

Avoid thermal decomposition of a component
Increase the total pressure of distillation
Reduce the number of plates
Increase the efficiency of separation

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Mass Transfer
Priming in a distillation column

Results from very low gas velocity
Is characterised by the presence of foam throughout the space between trays
Is desirable from point efficiency consideration
Reduces the overall pressure drop

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