Mass Transfer
Which of the following assumes constant molal vaporisation and overflow?

Ponchan-Savarit method
Plate absorption column
McCabe-Thiele method
Enthalpy concentration method

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Mass Transfer
Plate efficiency

Is a function of the mass transfer between liquid and vapour
Increases due to weeping and dumping of liquid
Increases due to foaming
Increases due to liquid entrainment

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