Mass Transfer
Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the

Packing may be crushed due to thermal expansion/contraction of the components of the equipments
Viscosity variation of the fluids may cause channeling/flooding
None of these
Pressure drop in the equipment will be very high

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Mass Transfer
In saturated gas, the

Vapour is in equilibrium with the liquid at the room temperature
None of the listed here
Partial pressure of vapour equals the vapour pressure of the liquid at room temperature
Vapour is in equilibrium with the liquid at the gas temperature

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