Mass Transfer
Solvent extraction is the terminology applied to the liquid-liquid extraction, which is preferred for the separation of the components of liquids, when

Extracting solvent is cheaply & abundantly available
One of the liquid components has very high affinity towards the solvent
Viscosity of liquid components is very high
One of the liquid components is heat sensitive

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Mass Transfer
Heat load in a cooling tower

Both A & B
Means the amount of heat thrown away (KCal/hr.) by the cooling tower
Is equal to the number of kg, of water circulated times the cooling range
Neither A nor B

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