Mass Transfer
The McCabe Δ L law states that the

Linear crystal growth rate depends on the crystal size
Linear crystal growth rate depends on the degree of supersaturation
Molar heats of vaporisation of components are nearly equal
Linear crystal growth rate does not depend on the crystal size

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Mass Transfer
Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled

And humidified
And dehumidified with increase in wet bulb temperature
And dehumidified with decrease in wet bulb temperature
At the same relative humidity

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