Mass Transfer
L/mG is the expression for

Slope of operating line in stripper
Absorption factor
Slope of operating line in absorber
Brinkman number

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Mass Transfer
The term "approach" in a cooling tower refers to the difference in the temperature of the

Cold water leaving the tower and the wet bulb temperature of the surrounding air
Hot water entering the tower and the wet bulb temperature of the surrounding air
Hot water entering and the cooled water leaving the cooling tower
None of these

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