Below is a phase diagram for the chloroform-acetone system. a. What is the compo

Question

Below is a phase diagram for the chloroform-acetone system. a. What is the composition of the liquid and vapor phases at the maximum boiling point on the diagram? b. Is it possible to start with a 50-50 mixture of acetone and chloroform and separate the mixture into pure acetone and chloroform? Explain. c. This type of phase diagram is called a maximum boiling azeotropic diagram. (i) What interactions between molecules would lead to such behavior? (ii) What would a plot of partial pressure vs. solution composition look like? (iii) What is meant by a positive deviation from Raoult's Law? (iv) Roughly sketch a minimum boiling azeotropic phase diagram.

Explanation / Answer

a) The composition of the liquid and vapor phases at the boiling point will be almost 0.60 parts of acetone and almost 0.40 parts of chloroform. At this point there´s only liquid phase present.

b) A 50-50 mixture can be separated because at this fraction there´s a little liquid present but almost vapor.

If we separate the vapor we´ll be able to obtain echa component

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