Mass Transfer
Entrainer used in azeotropic distillation should

Have high latent heat of vaporisation
Form a low boiling azeotrope with one of the constituents of the mixture
Have high viscosity to provide high tray efficiency
Form a new azeotrope of low relative volatility with one of the constituents of the mixture

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Mass Transfer
For absorbing a sparingly soluble gas in a liquid

Liquid side mass transfer co-efficient should be increased
Gas side mass transfer co-efficient should be increased
Mass transfer co-efficient must be kept constant
Liquid side mass transfer co-efficient should be decreased

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