Given information : The entire system is at equilibrium at 300 K . The volume of each chamber is 82.

Question

Given information : The entire system is at equilibrium at 300 K . The volume of each chamber is 82.1 L .
Total pressure in left chamber is 4 atm and in right chamber is $2 \mathrm{~atm} . \mathrm{NH}_{3(g)}$ and $\mathrm{H}_2 \mathrm{~S}_{(g)}$ are obtained only from dissociation of $\mathrm{NH}_4 \mathrm{HS}_{(s)}$ Based on this information, select the correct option.
Statement I : The $K_p$ value for the reaction, $\mathrm{NH}_4 \mathrm{HS}_{(s)} \rightleftharpoons \mathrm{NH}_{3(g)}+\mathrm{H}_2 \mathrm{~S}_{(g)}$ is $1 \mathrm{~atm}^2$.
Statement II : The partial pressure of He gas in the left chamber is 1 atm .

Professor PC Thomas Classes · Answer

(b) : $P_{\mathrm{He}(	ext { Left })}=P_{\mathrm{He} 	ext { (Right) }}=2 \mathrm{~atm}$ $P_{\mathrm{NH}_3}+P_{\mathrm{H}_2 \mathrm{~S}}=4-2=2 \mathrm{~atm}$; Also $P_{\mathrm{NH}_3}=P_{\mathrm{H}_2 \mathrm{~S}}=1 \mathrm{~atm} K_p=1 	imes 1=1 \mathrm{~atm}^2$