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At 35°C, the vapour pressure of CS(2) i...

At 35°C, the vapour pressure of `CS_(2)` is 512 mm Hg and of acetone is 344 mm Hg. A solution of `CS_(2)` and acetone in which the mole fraction of `CS_(2)` is 0.25, has a total vapour pressure of 600 mm Hg. Which of the following statement is correct ?

A

A mixture of 100 ml of acetone and 100 ml of `CS_2` has a volume of 200 ml

B

When acetone and `CS_(2)` are mixed at `35^@C` , heat must be absorbed in order to produce a solution at `35^@C`

C

Process of mixing is exothermic

D

Entropy of mixing is zero

Text Solution

Verified by Experts

The correct Answer is:
B
`P_("Ideal")=0.25xx512+0.75xx344=386` mm of Hg
`P_("Ideal")ltP_("observed")`
Hence, solution show + ve deviation
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