Mass Transfer
In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the

Approach is 10°F
Range is 15°F
Neither A nor B
Both A & B

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Mass Transfer
Entrainer used in azeotropic distillation should

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
Form a new azeotrope of low relative volatility with one of the constituents of the mixture

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