At 23°C, Kp = 0.075 for the equilibrium:

Question

NH4HS (s) ↔ NH3 (g) + H2S (g)

A sample of solid NH4HS is placed in a closed vessel and allowed to equilibrate. Calculate the equilibrium partial pressure (atm) of ammonia, assuming that some solid NH4HS remains.

Answer 1

..........NH4HS ==> NH3 + H2S
I..................0.......0
Equil...............p.......p
Kp = 0.075 = pNH3*pH2S
0.075 = p^2
p = sqrt(0.075) = ?

Answer 2

0.27