Mass Transfer
For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is

Known
Calculated
Unknown
Not required

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Mass Transfer
One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult's law is obeyed, then changing the feed composition would effect

The product composition but not the fraction vaporised
The fraction vaporised but not the product composition
Neither the product composition nor the fraction vaporised
The product composition as well as the fraction vaporised

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