Concise Physical Chemistry

c09 JWBS043-Rogers September 13, 2010 11:26 Printer Name: Yet to Come

PROBLEMS AND EXAMPLES 143

Problem 9.7

Find an area with two degrees of freedom, a coexistence curve with one degree of

freedom, and a point with no degrees of freedom on the phase diagram (Fig. 9.10).

Problem 9.8

Sketch a triangular phase diagram resembling Fig. 9.12.

(a) Locate the point corresponding to a binary solution containing components in

equal amounts.

(b) Locate the point corresponding (approximately) to a solution with three com-

ponents in the ratio 45%, 45%, 10%.

(c) Locate the point corresponding to 33.3% for each of the three components.

Problem 9.9

Sketch the three-component phase diagram for a system in which all three of the

components are miscible (soluble) in all proportions X in Y, X in Z, and Y in Z, but

phase separation takes place for some of the ternary mixtures XYZ.