Mass Transfer
Which of these columns incurs the lowest pressure drop?

Pulse column
Bubble plate column
Packed column (with stacked packing)
Packed column (with dumped packing)

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Mass Transfer
McCabe-Thiele method

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

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