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

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

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Mass Transfer
A coalescer in a mixer-settler liquid-liquid extraction coloumn

Helps in increasing the settling rate of the bubbles
All of these
Helps in increasing the bubble size entering the settler
Comprises of thin bed of substances of extended surface having high porosity

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