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5.3 Equilibria

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Question 40

A compound can exist in two forms, P and Q. In the forward reaction, P changes into Q.

A student places only P in a sealed container. The container is kept at 20 °C until the amount of P no longer changes. The temperature is then changed twice. After each change, the amount of P is measured when it no longer changes.

Temperature in °CAmount of P in mol
200.72
600.35
200.72

Use the results to explain what they show about the reaction and about the energy transfer in the forward reaction.

[3]
Markscheme

5.3 Equilibria Questions

  1. GCSE
  2. /Chemistry
  3. /5.3 Equilibria

124 exam-style questions on OCR GCSE Chemistry 5.3 Equilibria, covering 5.3.1 Reversible reactions and dynamic equilibrium and 5.3.2 Changing the position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

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