Mass Transfer
Extraction of coffee from its seed is done by

Liquid-liquid extraction
Steam distillation
Leaching
Extractive distillation

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Mass Transfer
For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because

Lewis number is close to unity
They are always equal under all circumstances
Water has a high latent heat of evaporation
Solubility of the components of air in water is very small

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