Mass Transfer
Corresponding to Prandtl number in heat transfer, the dimensionless group in mass transfer is the __________ number.

Peclet
Stanton
Sherwood
Schmidt

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Mass Transfer
Entrainer used in azeotropic distillation should

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

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