Mass Transfer
For gas absorption, low viscosity solvents are preferred, because of their

All of these
Rapid absorption rates
Better flow characteristics
Low pumping pressure drop

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

Both A & B
Pr = Sc ; there won
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

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