Vapor–liquid equilibrium for heptane–toluene system.(a) The vapor pressure of toluene is given in Exercise 4.8, and that of n-heptane is in the table below. Construct the following plots:(a) an x–y diagram at 1 atm using Raoult’s and Dalton’s laws; (b) a T–x bubble-point curve at 1 atm; (c) a and K-values versus temperature; and (d) repeat of part (a) using an average value of a. Then, (e) compare your x–y and T–x–y diagrams with the following experimental data of Steinhauser and White. VAPOR PRESSURE OF n-HEPTANEVapor pressure, torr:2040601002004007601,520Temperature, °C:p.5 22.330.641.858.778.098.4124VAPOR-LIQUID EQUILIBRIUM DATA FOR n-HEPTANE/TOLUENE AT 1 ATMXp heptaneYn-heptane0.048T, °C0.0251 10.750.1290.205106.800.3540.454102.950.4970.577101.350.8430.86498.900.9400.94898.500.9940.99398.35 VAPOR PRESSURE OF TOLUENEVapor pressure, torr.204007601,52060Temperature, °C:31.84010020040.351.969.589.513618.4110.6

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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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Vapor–liquid equilibrium for heptane–toluene system.
(a) The vapor pressure of toluene is given in Exercise 4.8, and that of n-heptane is in the table below. Construct the following plots:(a) an x–y diagram at 1 atm using Raoult’s and Dalton’s laws; (b) a T–x bubble-point curve at 1 atm; (c) a and K-values versus temperature; and (d) repeat of part (a) using an average value of a. Then, (e) compare your x–y and T–x–y diagrams with the following experimental data of Steinhauser and White.

VAPOR PRESSURE OF n-HEPTANE
Vapor pressure, torr:
20
40
60
100
200
400
760
1,520
Temperature, °C:
p.5 22.3
30.6
41.8
58.7
78.0
98.4
124
VAPOR-LIQUID EQUILIBRIUM DATA FOR n-HEPTANE/
TOLUENE AT 1 ATM
Xp heptane
Yn-heptane
0.048
T, °C
0.025
1 10.75
0.129
0.205
106.80
0.354
0.454
102.95
0.497
0.577
101.35
0.843
0.864
98.90
0.940
0.948
98.50
0.994
0.993
98.35

VAPOR PRESSURE OF TOLUENE
Vapor pressure, torr.
20
400
760
1,520
60
Temperature, °C:
31.8
40
100
200
40.3
51.9
69.5
89.5
136
18.4
110.6

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