Question: A multi-stage distillation column is used to separate a binary mixture of saturated liquid feed. The reflux ratio is 3. The mole fraction of the

A multi-stage distillation column is used to separate a binary mixture of saturated liquid feed. The reflux ratio is 3. The mole fraction of the more volatile component is 0.4 in the feed and 0.98 in the distillate. Determine the vapour mole fraction at the point where the operating lines cross on the x-y diagram.

Answer to example question: 0.545

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