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Chemical Engineering · Q503

Chemical Engineering Thermodynamics

Engineering and GATE · Chemical Engineering · question 503

Q503

The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n- octane into pure compounds each at 1 atm is

A.
-2 RT ln 0.5
B.
-RT ln 0.5
Answer
C.
0.5 RT
D.
2 RT

Answer: Option B

Solution

Answer: Option B
Solution:
Entropy of mixing is

Since, work