lab report due in two hours!! Please help me with the question below. Thank you!

Question

lab report due in two hours!! Please help me with the question below. Thank you!

Questions: A solution contains 2.1 mole A and 7.9 mole of B and has a boiling point of 82 degree at 760 Torr.

1) what is vapor pressure of pure A at 82 degree?

2) What is vapor pressure of pure B at 82 degree?

3) What is the vapor pressure of A in the mix at 82 degree?

4) What is the vapor pressure of B in the mix at 82 degree?

5) What is mol fraction A in the vapor?

6) What is the mol fraction B in the vapor?

7) What is the mol fraction A in the liquid?

8) What is the mol fraction B in the liquid?

9) The vapor is enrich in(circle one): compound A Compound B Nither Both

Thank you!

2500 2000 P(B) 1500 Normal boiling point 1000 500 20 30 40 0 60 70 80 90 100 TC Pressures of Ideal Liquids A and B at Different Temperatures

Explanation / Answer

Q1

A --> choose squares

at T = 82 --> approx 1900 torr

Q2

B --> choose circles

at T = 82 --> approx 450 torr

Q3

in the mix:

vapor pressure of A will have the SAME vapor pressure

Q4

liquid mol frac.

A = 2.1/(2.1+7.9) = 0.21

B = 1-0.21 = 0.79

then

PA = 0.21*760 = 159.6

PB = 0.79*760 = 600.4

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