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...

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

Extracted text: 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


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