Mass Transfer
The Hatta number is important in

Binary distillation
Multicomponent distillation
Gas absorption with chemical reaction
Gas absorption without chemical reaction

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Mass Transfer
A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,

The top and bottom compositions are unchanged with and without total reflux
Reboiler load and condenser load are minimum
The top and bottom compositions correspond to the maximum enrichment available
Composition of vapors and that of liquid do not vary throughout the column

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