For PCl5 <=> PCl3 + Cl2, the equilibrium partial pressures are PCl5 20 kPa, PCl3 40 kPa and Cl2 40 kPa. What is Kp?

Answer and explanation

Correct answer: A. 80 kPa

  1. Step 1: . Step 2. kPa. Answer: 80 kPa. Why not the others: 2 kPa divides 40 by 20 without the second 40; 0.013 kPa inverts the expression; 1600 kPa forgets to divide by the PCl5 pressure.

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