Mass Transfer
Boiling point diagram is

A plot of temperature vs. liquid composition
Not affected by pressure
Affected by pressure
A plot of temperature vs. vapour composition

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Mass Transfer
Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled

And dehumidified with decrease in wet bulb temperature
And dehumidified with increase in wet bulb temperature
And humidified
At the same relative humidity

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Mass Transfer
A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,

Composition of vapors and that of liquid do not vary throughout the column
The top and bottom compositions correspond to the maximum enrichment available
Reboiler load and condenser load are minimum
The top and bottom compositions are unchanged with and without total reflux

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