?An example of the positive deviation shown in Figure 12.8(a) is a solution made of
Chapter 12, Problem 129P(choose chapter or problem)
An example of the positive deviation shown in Figure 12.8(a) is a solution made of acetone \(\left(\mathrm{CH}_3 \mathrm{COCH}_3\right)\) and carbon disulfide (C \(\left.\mathrm{S}_2\right)\).
(a) Draw Lewis structures of these molecules. Explain the deviation from ideal behavior in terms of intermolecular forces.
(b) A solution composed of 0.60 mole of acetone and 0.40 mole of carbon disulfide has a vapor pressure of 615mmHg at \(35.2^{\circ} \mathrm{C}\). What would be the vapor pressure if the solution behaved ideally? The vapor pressure of the pure solvents at the same temperature are: acetone: 349mmHg; carbon disulfide: 501mmHg}.
(c) Predict the sign of \(\Delta H_{\text {soln }}\).
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