For the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), what is the expression for Kp? (2020)

Practice Questions

Q1
For the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), what is the expression for Kp? (2020)
  1. (P_NH3)^2 / (P_N2)(P_H2)^3
  2. (P_N2)(P_H2)^3 / (P_NH3)^2
  3. (P_NH3)^2 / (P_H2)^3
  4. (P_N2)(P_H2) / (P_NH3)^2

Questions & Step-by-Step Solutions

For the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), what is the expression for Kp? (2020)
  • Step 1: Identify the reaction given: N2(g) + 3H2(g) ⇌ 2NH3(g).
  • Step 2: Understand that Kp is the equilibrium constant expressed in terms of partial pressures.
  • Step 3: Write down the products and reactants of the reaction.
  • Step 4: For the products (NH3), since there are 2 moles, we will square its partial pressure: (P_NH3)^2.
  • Step 5: For the reactants (N2 and H2), write their partial pressures. N2 has 1 mole, so it is (P_N2) and H2 has 3 moles, so we will cube its partial pressure: (P_H2)^3.
  • Step 6: Combine these into the Kp expression: Kp = (P_NH3)^2 / ((P_N2)(P_H2)^3).
  • Equilibrium Constant Expression – Understanding how to derive the expression for Kp based on the balanced chemical equation and the relationship between partial pressures of reactants and products.
  • Partial Pressures – Knowledge of how to express concentrations in terms of partial pressures for gaseous reactions.
Soulshift Feedback ×

On a scale of 0–10, how likely are you to recommend The Soulshift Academy?

Not likely Very likely