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

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

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Mass Transfer
Blowdown in a cooling tower

Means discarding a small fraction of circulating water to prevent and limit the concentration of salt and impurities
Is undesirable
All of these
Increases the scale forming tendencies of water

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