Question

$N{H}_{4}HS\left(s\right)\rightleftharpoons N{H}_3\left(G\right)+H_{2}S\left(g\right)$
The equilibrium pressure at ${25}^{o}C$ is $0.660$atm. What is $K_p$ for the reaction?

• A. $0.109$
• B. $0.218$
• C. $1.89$
• D. $2.18$

Answer 1

The correct option is A $0.109$

$M{H}_{4}HS\left(s\right)\rightleftharpoons N{A}_3\left(r\right)+H_{2}s\left(r\right)$
$\therefore$ total pressure at $=P+P$
$2P$
$\therefore 2P=0.660$
$P=0.330$
$k_p=P^2$
$=(0.330{)}^2$
$=0.10g$