900 Figure 5.5 shows the experimentally determined phase diagrams for the nearly ideal solution of hexane and heptane. (i) Label the regions of the diagrams to which phases are present. (ii) For a solution containing Imol each of hexane and heptane molecules, estimate the vapor pressure at 70 °C when vaporization on reduction of the external pressure just begins. (iii) What is the vapor pressure of the solution at 70 °C when just one drop of liquid remains. (iv) Estimate from the figures the mole fraction of hexane in the liquid and vapor phases for the conditions of part b. (v) What are the mole fractions for the conditions of part c? (vi) At 85 °C and 760 Torr, what are the amounts substance in the liquid and vapor phases when zheptane=0.40? 70 °C 700 500 30아- 0.2 0.4 0.6 0.8 Mole fraction of hexane, z, 100- 90 80 70 760 Torr 60 0.8 Mole fraction of hexane, z, 0.2 0.4 0.6 1 atm 760 Torr Figure 5.5 Phase diagrams for the nearly ideal solution of hexane and Temperature, e
900 Figure 5.5 shows the experimentally determined phase diagrams for the nearly ideal solution of hexane and heptane. (i) Label the regions of the diagrams to which phases are present. (ii) For a solution containing Imol each of hexane and heptane molecules, estimate the vapor pressure at 70 °C when vaporization on reduction of the external pressure just begins. (iii) What is the vapor pressure of the solution at 70 °C when just one drop of liquid remains. (iv) Estimate from the figures the mole fraction of hexane in the liquid and vapor phases for the conditions of part b. (v) What are the mole fractions for the conditions of part c? (vi) At 85 °C and 760 Torr, what are the amounts substance in the liquid and vapor phases when zheptane=0.40? 70 °C 700 500 30아- 0.2 0.4 0.6 0.8 Mole fraction of hexane, z, 100- 90 80 70 760 Torr 60 0.8 Mole fraction of hexane, z, 0.2 0.4 0.6 1 atm 760 Torr Figure 5.5 Phase diagrams for the nearly ideal solution of hexane and Temperature, e
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:900s
Figure 5.5 shows the experimentally determined phase diagrams for the
nearly ideal solution of hexane and heptane.
(i) Label the regions of the diagrams to which phases are present.
(ii) For a solution containing Imol each of hexane and heptane
molecules, estimate the vapor pressure at 70 °C when vaporization on
reduction of the external pressure just begins.
(iii) What is the vapor pressure of the solution at 70 °C when just one
drop of liquid remains.
(iv) Estimate from the figures the mole fraction of hexane in the liquid
and vapor phases for the conditions of part b.
(v) What are the mole fractions for the conditions of part c?
(vi) At 85 °C and 760 Torr, what are the amounts substance in the liquid
and vapor phases when zheptane=0.40?
70 °C
700
50아-
30아
0.2
0.4
0.6
0.8
1
Mole fraction of hexane, z
100-
90
80F
70
760 Torr
60
0.2
0.4
0.6
0.8
1
Mole fraction of hexane, z
1 atm 760 Torr
Figure 5.5 Phase diagrams for the nearly ideal solution of hexane and
heptane.
Temperature, arc
Pressure, p/Torr
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