In evacuated closed vessel the total pressure is P bar at equilibrium. Write equilibrium constant K_p of the following reaction. Reaction : NH_4HS_((s)) hArr NH_(3(g)) + H_2S_((g))

In evacuated closed vessel the total pressure is P bar at equilibrium.

1.	In evacuated closed vessel the total pressure is P bar at equilibrium. Write equilibrium constant K_p of the following reaction. Reaction : NH_4HS_((s)) hArr NH_(3(g)) + H_2S_((g))
Answer» Solution :`{:("REACTION:", NH_4HS_((s)) hArr , NH_(3(g))+ , H_2S_((g))), ("Initial concentration:",,Zero,Zero),("Partial pressure at EQUILIBRIUM:",,p_(NH_3),p_(H_2S)):}` TOTAL pressure at equilibrium = P bar, So, `THEREFORE p_(NH_3)=P/2 = p_(H_2S)` So, `K_p=(p_(NH_3))(p_(H_2S))` `therefore K_p=(P/2)(P/2)=P^2/4` `therefore P^2=4K_p` and `P=2sqrt(K_p)`