For the gas‐phase equilibrium at 700 K 2 SO (g) + O (g) ⇌ 2 SO (g)

CHEMISTRY · Single correct · A Level · Chemistry · Gaseous equilibria (Kp) · Gaseous equilibria (Kp)

Problem

For the gas‐phase equilibrium at 700 K 2 SO

_2

(g) + O

_2

(g) ⇌ 2 SO

_3

(g)

K_p = 4.0

. A vessel at 700 K contains the following partial pressures: P(SO

_2

) = 0.50 atm, P(O

_2

) = 0.20 atm, P(SO

_3

) = 2.0 atm. Which of the following is true about the system? (a)

Q_p = 0.0125 < K_p

; the reaction will shift toward the products. (b)

Q_p = 20 > K_p

; the reaction will shift toward the reactants. (c)

Q_p = 80 > K_p

; the reaction will shift toward the reactants. (d)

Q_p = 16 > K_p

; the reaction will shift toward the reactants.