Chemistry - Ideal Gas Question with Solution | TestHub

Let the initial amount be $n$; the final amount is 0.8n.

$V$ is proportional to nT/$P$: $V_2$/$V_1$ = (0.8)(240/300)(1.00/0.40) = 0.8 x 0.8 x 2.5 = 1.6.

Change with respect to the final volume = ($V_2$ - $V_1$)/$V_2$ = 1 - 1/1.6 = 1 - 0.625 = 0.375.

Ignoring the leak gives $V_2$/$V_1$ = 2 and 0.50; 0.625 is $V_1$/$V_2$; 0.60 is 1 - 0.40.

Answer: ($C$).