Mass Transfer
Which of the following assumes constant molal vaporisation and overflow?

Plate absorption column
Enthalpy concentration method
Ponchan-Savarit method
McCabe-Thiele method

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Mass Transfer
Entrainer used in azeotropic distillation should

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
Have high latent heat of vaporisation

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