Mass Transfer
Humid volume is the total volume in m³ of 1 kg of

Vapour laden gas at 1 atm. and room temperature
Vapour laden gas at 1 atm. and gas temperature
Gas plus its accompanying vapour at 1 atm. and gas temperature
Gas plus its accompanying vapour at 1 atm. and room temperature

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Mass Transfer
Inside the distillation column, the

Liquids are not always at their bubble points
Pressure increases gradually from bottom to the top of the column
Driving force for the vapour flow is the pressure drop
None of these

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

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

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