Mass Transfer
As the reflux ratio in a distillation coloumn is increased from the minimum, the

Liquid flow increases while the vapor flow decreases for a system
Number of plates decreases very slowly first and then more and more rapidly
Slope of the operating line in stripping section decreases
Total cost first decreases and then increases

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Mass Transfer
In steam distillation, the

Temperature is 100°C
Temperature is higher than the boiling point of either component
Product must be immiscible with water
Temperature is more than 100° C

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