At 35oC, the vapour pressure of CS2 is 512 mm. Hg and that of acetone is 344 mm Hg. A solution of CS2 in acetone has a total vapour pressure of 600 mm Hg. The false statement amongst the following is :
Solution
As the vapour pressure of mixture increases so the force of attraction of mixture is less than the individual component.
<br><br>Since the vapour pressure of the solution is
greater than individual vapour pressure of both
pure components, the solution shows a
positive deviation from Raoult’s law.
<br><br>$\therefore$ $\Delta$<sub>Sol</sub>H $>$ 0
<br><br>As $\Delta$<sub>Sol</sub>H $>$ 0 then solution is endothermic.
<br><br> and here $\Delta$<sub>Sol</sub> Volume $>$ 0. As $\Delta$<sub>Sol</sub> Volume $>$ 0 then a mixture of 100 ml. CS<sub>2</sub> and 100 ml. acetone has a volume more than 200 ml. It happens because the distance between molecules increases due to force of attraction of mixture decreases.
About this question
Subject: Chemistry · Chapter: States of Matter · Topic: Gas Laws
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