Reactant gases are introduced into a reaction vessel through an inlet valve. The gases then react reversibly, and products can leave through an outlet valve. Which procedure allows dynamic equilibrium to become established?
Keep the inlet valve open and close the outlet valve
Close the inlet valve and continuously remove products through the outlet valve
Continuously add reactants through the inlet while keeping the outlet open
Close both valves after the reactant gases have been introduced
109 exam-style questions on AQA GCSE Chemistry 6.2 Reversible reactions and dynamic equilibrium, covering 6.2.1 Reversible reactions, 6.2.2 Energy changes and reversible reactions, 6.2.3 Equilibrium, 6.2.4 The effect of changing conditions on equilibrium, 6.2.5 The effect of changing concentration, 6.2.6 The effect of temperature changes on equilibrium, and 6.2.7 The effect of pressure changes on equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.