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Equilibrium constant Kp​ for homogeneous systems (A-level only)

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Question 6

Which statement about the industrial synthesis of ammonia from nitrogen and hydrogen is correct?

N2(g)+3H2(g)⇌2NH3(g)ΔH=−92 kJ mol−1 \text{N}_2(\text{g}) + 3\text{H}_2(\text{g}) \rightleftharpoons 2\text{NH}_3(\text{g}) \quad \Delta H = -92\text{ kJ mol}^{-1} N2​(g)+3H2​(g)⇌2NH3​(g)ΔH=−92 kJ mol−1
A

The use of an iron catalyst increases the equilibrium yield of ammonia.

B

An increase in temperature, at constant pressure, decreases the value of KpK_{\text{p}}Kp​.

C

A decrease in pressure, at constant temperature, increases the equilibrium yield of ammonia.

D

The industrial reaction is carried out at room temperature to achieve a high rate of reaction.

Markscheme

Equilibrium constant Kp for homogeneous systems (A-level only) Questions

  1. A Level
  2. /Chemistry
  3. /Equilibrium constant Kp for homogeneous systems (A-level only)

31 exam-style questions on AQA A Level Chemistry Equilibrium constant $K_p$ for homogeneous systems (A-level only), covering Equilibrium constant $K_p$ for homogeneous systems (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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