Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Changing the pressure
19 practice questions
Practice questions
1–3 of 3 · Hard
Question 1
2 marks · Hard
Answer and see the solution →Consider the following reversible reaction, which takes place in a sealed vessel at constant temperature:
Explain why changing the pressure will or will not affect the position of equilibrium for this reaction.
Question 2
5 marks · Hard
Answer and see the solution →The equation for a reaction that reaches equilibrium in a sealed container is:
A student investigates how changing the pressure affects this equilibrium.
(a)[1 mark]State the total number of moles of gaseous molecules on each side of the equation.
(b)[2 marks]Predict, with a reason, what will happen to the position of equilibrium if the pressure in the container is increased.
(c)[2 marks]If the pressure is decreased, which side of the equilibrium will be favoured? Explain your answer.
Question 3
2 marks · Hard
Answer and see the solution →Explain, using the idea of gaseous molecules, why changing the pressure does not influence the equilibrium position in reactions involving only solids and liquids.