Mass Transfer
If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is

0.31
0.215
0.017
0.107

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Mass Transfer
Flights in a rotary dryer are provided to

Lift and shower the solids thus exposing it thoroughly to the drying action of the gas
None of these
Reduce the residence time of solid
Increase the residence time of the solid

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