Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Catalysts in industry
19 practice questions
Practice questions
1–3 of 3 · Hard
Question 1
5 marks · Hard
Answer and see the solution →The diagram below shows the energy changes during a chemical reaction.
(a)[2 marks]Explain, in terms of activation energy, how a catalyst increases the rate of a reaction.
(b)[2 marks]A student suggests that adding a catalyst would change the total enthalpy change (ΔH) of a reaction. Is this correct? Explain your answer.
(c)[1 mark]Describe, using a reaction profile diagram, what happens to the activation energy and enthalpy change of a reaction when a catalyst is used.
Question 2
2 marks · Hard
Answer and see the solution →Describe two key features that should be shown on a reaction profile diagram to illustrate the effect of a catalyst on a reaction.
Question 3
2 marks · Hard
Answer and see the solution →Ammonia is produced in the Haber process, which requires high temperatures and pressures. The process uses an iron catalyst.
Explain two ways that using a catalyst in the Haber process is important for the chemical industry.