Using Figure 12.4 predict the expected boiling point and mole percentage of pentaneexpected if a solution which was 20 % pentane and 80% hexane (mol percent) was distilled(only one equilibrium temperature/theoretical plate)? 7065Vapor605550FIGURE 12.4Calculated4540 ytemperature-composition diagramfor pentanehexanesolutions at 1.0 atmLiquid35.1300.0pressure.0.20.41.00.6Mole fraction of hexane0.8Temperature ("C)

Answered: 70 65 Vapor 60 55 50 2.4 45 40 Liquid n…

70 65 Vapor 60 55 50 2.4 45 40 Liquid n diagram hexane 1.0 atm 35.1 30 0.0 0.2 0.4 1.0 0.6 Mole fraction of hexane 0.8 Temperature ((C)

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter6: Equilibria In Single-component Systems

Section: Chapter Questions

Problem 6.3E

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Question

Using Figure 12.4 predict the expected boiling point and mole percentage of pentane
expected if a solution which was 20 % pentane and 80% hexane (mol percent) was distilled
(only one equilibrium temperature/theoretical plate)?

70
65
Vapor
60
55
50
FIGURE 12.4
Calculated
45
40 y
temperature-
composition diagram
for pentanehexane
solutions at 1.0 atm
Liquid
35.1
30
0.0
pressure.
0.2
0.4
1.0
0.6
Mole fraction of hexane
0.8
Temperature ("C)

Expert Solution

Step 1t

According to the plot given

From the plot it is clear that phase transition takes place. At $64^{\circ}$ C, the phase transition from L + V to vapor phase occurs for the 80% hexane and 20% pentane.

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