Mass Transfer
Dimension of mass diffusivity is the same as that of

Dynamic viscosity
Pressure
Kinematic viscosity
Surface tension

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

Pr = Sc ; there won
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

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Mass Transfer
Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled

And humidified
And dehumidified with decrease in wet bulb temperature
At the same relative humidity
And dehumidified with increase in wet bulb temperature

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