Question

At ${35}^{o}C$, the vapour pressure of $C{S}_2$ is $512mm$ $Hg$, and acetone is $344mm$ $Hg$. A solution of $C{S}_2$ and acetone in, which the mol fraction of $C{S}_2$ is $0.25$, has a total vapour pressure of $600mm$ $Hg$. Which of the following statements is/are correct:

• A. A mixture of $100mL$ of acetone and $100mL$ $C{S}_2$ of has a volume is $200mL$
• B. When acetone and $C{S}_2$ are mixed at ${35}^{o}C$, heat must be absorbed in order to produce a solution at ${35}^{o}C$
• C. When acetone and $C{S}_2$ are mixed at ${35}^{o}C$, heat is released
• D. There is negative deviation from Raoult's law

Answer 1

Answer: (A), (B)

The correct options are
A A mixture of $100mL$ of acetone and $100mL$ $C{S}_2$ of has a volume is $200mL$
B When acetone and $C{S}_2$ are mixed at ${35}^{o}C$, heat must be absorbed in order to produce a solution at ${35}^{o}C$