Chapter 13, Problem 77E

Assume that the change in pressure of H₂S is small enough to be neglected in the following problem,

(a) Calculate the equilibrium pressures of all species in an equilibrium mixture that results from the decomposition of H₂S with an initial pressure of 0.824 atm.

${\text{2H}}_2\text{S}\left(g\right)\rightleftharpoons {\text{2H}}_2\left(g\right)+{\text{S}}_2\left(g\right)$ $K_p=2.2\times {10}^{-6}$

(b) Show that the change is small enough to be neglected.