When does pressure affect equilibrium?
When does pressure affect equilibrium?
The equilibrium position is the relative amount of reactants and products present when a reversible reaction reaches equilibrium in a closed system. Changing pressure affects the equilibrium position only when gases are involved in the reaction and the total number of moles of gas differs between the reactant and product sides.
Step-by-step lessons on AQA GCSE Chemistry 6.2.7 The effect of pressure changes on equilibrium (HT only). Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.