Chapter 14, Problem 14.62QP

The following reaction has an equilibrium constant K_c equal to 3.59 at 900°C.

${\text{CH}}_4(g)+2{\text{H}}_2\text{S}(g)\stackrel{}{\rightleftharpoons }{\text{CS}}_2(g)+4{\text{H}}_2(g)$

For each of the following compositions, decide whether the reaction mixture is at equilibrium. If it is not, decide which direction the reaction should go.

1. a [CH₄] = 1.26 M, [H₂S] = 1.32 M, [CS₂] = 1.43 M, [H₂] = 1.12 M
2. b [CH₄] = 1.25 M, [H₂S] = 1.52 M, [CS₂] = 1.15 M, [H₂] = 1.73 M
3. c [CH₄] = 1.30 M, [H₂S] = 1.41 M, [CS₂] = 1.10 M, [H₂] = 1.20 M
4. d [CH₄] = 1.56 M, [H₂S] = 1.43 M, [CS₂] = 1.23 M, [H₂] = 1.91 M