Based on this diagram, answer the following questions: a) starting from a liquid mixture of 20 mol A and 80 mol B , at which T will it start to boil? b) Which would be the composition of the first vapour appeared? c) At which temperature will disappear the last liquid drop? Which will be its composition? d) How many boiling-condensation cycles would be needed for obtaining compound A with at least 90% purity? Give the composition of each vapour obtained in the process. Results: a) T ≈ 112.2 ºC, yA ≈ 0.30; b) T ≈ 115 ºC, xA ≈ 0.12; * c) 1st step: T ≈ 112.2 ºC yA ≈ 0.30 2nd step: T ≈ 108.5 ºC yA ≈ 0.422 3rd step: T ≈ 105.5 ºC yA ≈ 0.590 4th step: T ≈ 100.5ºC yA ≈ 0.720 5th step: T ≈ 97 ºC yA ≈ 0.820 6th step: T ≈ 94 ºC yA ≈ 0.865 7th step: T ≈ 92.7 ºC yA ≈ 0.925 a) starting from a liquid mixture of 20 mol A and 80 mol B , at which T will it start to boil?b) Which would be the composition of the first vapour appeared?c) At which temperature will disappear the last liquid drop? Which will be its composition?d) How many boiling-condensation cycles would be needed for obtaining compound A with atleast 90% purity? Give the composition of each vapour obtained in the process.Results: a) T= 112.2 °C, ya = 0.30; b) T= 115 °C, XA ~ 0.12; *c)1st step:T= 112.2 °C ya - 0.302nd step:T= 108.5 °C ya = 0.4223rd step:T= 105.5 °C yA = 0.5904th step:T= 100.5°C ya = 0.7205th step:YA = 0.820T-97 °C6th step:T=94 °CYA = 0.8657th step:T= 92.7 °C yA ~ 0.925 130120T (°C)11010090800.20.40.60.81X.

Note: Since we are entitled to answer only 3 subparts, we’ll answer the first three as no specific…

Answered: a) starting from a liquid mixture of 20…

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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Based on this diagram, answer the following questions:
a) starting from a liquid mixture of 20 mol A and 80 mol B , at which T will it start to boil?
b) Which would be the composition of the first vapour appeared?
c) At which temperature will disappear the last liquid drop? Which will be its composition?
d) How many boiling-condensation cycles would be needed for obtaining compound A with at
least 90% purity? Give the composition of each vapour obtained in the process.
Results: a) T ≈ 112.2 ºC, yA ≈ 0.30; b) T ≈ 115 ºC, xA ≈ 0.12; *
c) 1st step: T ≈ 112.2 ºC yA ≈ 0.30
2nd step: T ≈ 108.5 ºC yA ≈ 0.422
3rd step: T ≈ 105.5 ºC yA ≈ 0.590
4th step: T ≈ 100.5ºC yA ≈ 0.720
5th step: T ≈ 97 ºC yA ≈ 0.820
6th step: T ≈ 94 ºC yA ≈ 0.865
7th step: T ≈ 92.7 ºC yA ≈ 0.925

a) starting from a liquid mixture of 20 mol A and 80 mol B , at which T will it start to boil?
b) Which would be the composition of the first vapour appeared?
c) At which temperature will disappear the last liquid drop? Which will be its composition?
d) How many boiling-condensation cycles would be needed for obtaining compound A with at
least 90% purity? Give the composition of each vapour obtained in the process.
Results: a) T= 112.2 °C, ya = 0.30; b) T= 115 °C, XA ~ 0.12; *
c)
1st step:
T= 112.2 °C ya - 0.30
2nd step:
T= 108.5 °C ya = 0.422
3rd step:
T= 105.5 °C yA = 0.590
4th step:
T= 100.5°C ya = 0.720
5th step:
YA = 0.820
T-97 °C
6th step:
T=94 °C
YA = 0.865
7th step:
T= 92.7 °C yA ~ 0.925

130
120
T (°C)
110
100
90
80
0.2
0.4
0.6
0.8
1
X.

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