Mass Transfer
In saturated gas, the

Vapour is in equilibrium with the liquid at the room temperature
Vapour is in equilibrium with the liquid at the gas temperature
Partial pressure of vapour equals the vapour pressure of the liquid at room temperature
None of the listed here

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Mass Transfer
McCabe-Thiele method

Uses weight fractions to express liquid and vapour composition
Can use any type of units
Is more accurate than Ponchan-Savarit method
Uses molal units for material and energy balance

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