Mass Transfer
If a two phase system is in physical equilibrium; then it means that, the

Total pressure throughout the liquid phase is equal to that throughout the vapor phase
All of these
Temperature of the liquid phase is equal to that of the vapor phase
Escaping tendency of each component from the liquid phase to the vapor phase is exactly equal to that from vapor phase to liquid phase

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Mass Transfer
Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?

Heating and dehumidification at almost constant wet bulb temperature
Dehumidification with dry bulb temperature remaining constant
None of these
Cooling and dehumidification

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