Chapter 15, Problem 43E

Write an equilibrium expression for each chemical equation.

a. $2{\text{NO}}_{\text{2}}(g)\rightleftharpoons {\text{N}}_{\text{2}}{\text{O}}_{\text{4}}(g)$

b. $2\text{BrNO}(g)\rightleftharpoons 2\text{NO}(g)+{\text{Br}}_{\text{2}}(g)$

c. ${\text{H}}_{\text{2}}\text{O}(g)+\text{CO}(g)\rightleftharpoons {\text{H}}_{\text{2}}(g)+{\text{CO}}_{\text{2}}(g)$

d. ${\text{CH}}_{\text{4}}(g)+2{\text{H}}_2\text{S}(g)\rightleftharpoons {\text{CS}}_{\text{2}}(g)+4{\text{H}}_{\text{2}}(g)$