Mass Transfer
Mass transfer co-efficient is defined as

Flux = Co-efficient/concentration difference
Co-efficient = Flux/concentration difference
Flux=concentration difference/co-effi-cient
None of the listed here

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

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

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Mass Transfer
In case of a desorber (stripper), the

Operating line always lies below the equilibrium curve
Temperature always increases
Operating line always lies above the equilibrium curve
Temperature remains unaffected

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