Mass Transfer
Make up water is supplied during cooling tower operation to compensate for water losses due to

Blowdown
Entrainment
All of these
Evaporation

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Mass Transfer
Molecular diffusion is caused by the

Potential energy of the molecules
Transfer of molecules from low concentration to high concentration region
Thermal energy of the molecules
Activation energy of the molecules

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Mass Transfer
When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system,

As the acetone concentration increases, the solubility curves approach each other
All of these
Both the phases become identical at a particular common point on both the solubility curves called the plait point
The distribution curve which is a plot between x (acetone concentration in one phase) and y (acetone concentration in other phase) is analogous to x-y curve used in distillation and absorption termina

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