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Topic: Distillation Curve (Vapor Line & Liquid Line)  (Read 1924 times)

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Offline ponyoponyo

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Distillation Curve (Vapor Line & Liquid Line)
« on: April 01, 2013, 09:26:51 AM »
I need to know if my answer to this question is correct

What would be the comp of the first liquid to occur if a gas mixture containing 50% B were cooled from 100oC?



I know the top line is the vapor line, the composition of the vapor which shows how much enrichment in the lower boiling component occurs. And I know the bottom line is the liquid line, the boiling point of the mixture.  think the answer would be 28% B. To do this I started at 50% B at the top of the graph, went straight down to the liquid line, went left to the vapor line, and then straight down the the B % composition and got 28% B. Is my thinking correct?

Offline curiouscat

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Re: Distillation Curve (Vapor Line & Liquid Line)
« Reply #1 on: April 01, 2013, 09:53:27 AM »
Think you are wrong. It will be ~70%.

As a cross check, Is A more volatile or B here?  Is the more volatile component concentrated in liq. or vap. phase?
« Last Edit: April 01, 2013, 01:40:33 PM by curiouscat »

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