Mass Transfer
Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 x 10⁻³ kg mole/m².s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m² .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is

8.5 x 10⁻⁴
5.6 x 10⁻³
8.5 x 10⁻³
5.6 x 10⁻⁴

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Mass Transfer
Entrainer used in azeotropic distillation should

Have high viscosity to provide high tray efficiency
Form a low boiling azeotrope with one of the constituents of the mixture
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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