Figure P10-30 is a P-T diagram for the ethene + n-heptane system at 96.9% by mole ethene (Kay, 1948). Please answer the following questions based on this figure. Note that the “•” in the figure describes the critical point for the mixture at this composition.

A. What is the curve to the left of the critical point called? 

B. What is the curve to the right of the critical point called? Based on W. B. Kay, Ind. Eng. Chem., 40, 1459 (1948). 

C. What is the percentage of liquid and vapor at point A? 

D. What is the percentage of liquid and vapor at point C? 

E. Would you expect point B to be 100% liquid, 100% vapor, or something in between? 

F. Does the figure imply retrograde condensation? Please explain.

Transcribed Image Text:

Pressure (psia) 1400 1200 1000 800 600 400 200 0 -100 -50 0 96.9% Ethene 100 Ao BO со 150 200 50 Temperature (°F) FIGURE P10-30 P-T diagram for the ethene + n-heptane system at 96.9% by mole ethene. Based on W. B. Kay, Ind. Eng. Chem., 40, 1459 (1948).