Mass Transfer
The reciprocal of stripping factor is termed as

Relative volatility
Murphree efficiency
Absorption factor
Selectivity index

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Mass Transfer
In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because

Saturated steam is used for steam distillation
Mixing of steam with the material being vaporised is not so intimate as to result in equilibrium condition
Total pressure is less
Temperature is less

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Mass Transfer
The wetted wall tower is used to determine

Individual mass transfer co-efficient (M.T.C.) in gaseous system
M.T.C. of individual components in a liquid-liquid system
The overall M.T.C. of the system
M.T.C. of liquid in liquid-gas system

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