Mass Transfer
The Hatta number is important in

Binary distillation
Multicomponent distillation
Gas absorption without chemical reaction
Gas absorption with chemical reaction

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Mass Transfer
One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult's law is obeyed, then changing the feed composition would effect

The product composition as well as the fraction vaporised
The fraction vaporised but not the product composition
Neither the product composition nor the fraction vaporised
The product composition but not the fraction vaporised

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Mass Transfer
In case of absorption with exothermic reaction, for fluids having

Both A & B
Pr = Sc = 1; total mass, momentum and thermal diffusivity will be the same
Pr = Sc; percentage change in heat and mass transfer flux will be the same for a given change in the degree of turbulence
Pr = Sc ; there won

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