Mass Transfer
An example of elutioh is

Separation of sugar from sugar beet by hot water
Dissolution of tannin out of tree barks by water
Recovery of vegetable oils from seeds
Separation of uranium oxide from its ore by H₂SO₄ in a Pachuca tank

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

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

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