For PCl₅(g) ⇌ PCl₃(g) + Cl₂(g), Kp = 1.05 at 250 °C. A vessel contains P_PCl₅ = 0.50 atm, P_PCl₃ = 0.30 atm, P_Cl₂ = 0.30 atm.
What is Q and which way does the system shift?
- A
Q = 1.05; at equilibrium.
- B
Q = 0.18; shifts left.
- Ccheck_circle
Q = 0.18; shifts right (forward).
- D
Q = 1.50; shifts left.
Explanation
Q = (0.30·0.30)/0.50 = 0.18. Q < Kp, so reaction shifts right (forward) to produce more products.