Mass Transfer
Relative humidity is the ratio of the

Partial pressure of the vapour to the vapour pressure of the liquid at room temperature
Partial pressure of the vapour to the vapour pressure of the liquid at gas temperature
Actual humidity to saturation humidity
None of these

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Mass Transfer
In a distillation operation, what is the effect of the temperature of the reflux stream (given below) on the condenser and reboiler loads? Reflux conditions:(i) Reflux stream is completely liquid and is at its bubble point.(ii) Reflux stream is below its bubble point.

Both condensor and reboiler loads are higher in case (ii) as compared to case (i)
Condenser load is the same in both the cases but reboiler load is higher in case (ii)
Reboiler load is the same in both the cases but condenser load is higher in case (ii)
Condenser and reboiler loads are the same in both the cases

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