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What is the equilibrium constant (Kc) for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)

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Question: What is the equilibrium constant (Kc) for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)? (2022) 2022

Options:

  1. 1.0 × 10^-5
  2. 1.0 × 10^-2
  3. 1.0 × 10^2
  4. 1.0 × 10^5

Correct Answer: 1.0 × 10^5

Exam Year: 2022

Solution: 

The equilibrium constant Kc for the formation of ammonia from nitrogen and hydrogen is typically around 1.0 × 10^5 at standard conditions.

What is the equilibrium constant (Kc) for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)

Practice Questions

Q1
What is the equilibrium constant (Kc) for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)? (2022) 2022
  1. 1.0 × 10^-5
  2. 1.0 × 10^-2
  3. 1.0 × 10^2
  4. 1.0 × 10^5

Questions & Step-by-Step Solutions

What is the equilibrium constant (Kc) for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)? (2022) 2022
  • Step 1: Identify the balanced chemical equation: N2(g) + 3H2(g) ⇌ 2NH3(g).
  • Step 2: Understand that Kc is a ratio of the concentrations of products to reactants at equilibrium.
  • Step 3: Write the expression for Kc: Kc = [NH3]^2 / ([N2] * [H2]^3).
  • Step 4: Recognize that at standard conditions, Kc for this reaction is known to be approximately 1.0 × 10^5.
  • Step 5: Conclude that the equilibrium constant Kc for the reaction is 1.0 × 10^5.
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