16. Chemical Equilibrium

Partial pressures of the following equilibrium mixture at 955 K are: 130 torr methane, 92 torr hydrogen sulfide, 167 torr hydrogen gas and 532 torr carbon disulfide. What is the value of Kc at 955 K?

CH4(g) + 2 H2S(g) ⇌ 4 H2(g) + CS2(g)

Consider the hypothetical reaction: ? X(g) + 3 Y(g) ⇌ 3 Z(g), where K_p = 1.16 x 10^–3 and K_c = 1.3 at 135°C. Find the value of the coefficient of X.

For which reaction(s) will K_p = K_c?

a) N₂(g) + O₂(g) ⇌ 2 NO(g)

b) CaCO₃(s) ⇌ CaO(s) + CO₂(g)

c) 2 CH₄(g) ⇌ C₂H₂(g) + 3 H₂(g)

d) H₂O(g) + CO(g) ⇌ H₂(g) + CO₂(g)

Select the correct choice below for the reaction:  PCl₅(g) ⇌ PCl₃(g) + Cl₂(g)