Two gases are reacting in a cylinder fitted with a movable piston. The piston is pulled outwards, increasing the volume occupied by the gases. No gas enters or leaves the cylinder, and the temperature remains constant.
Explain why pulling the piston outwards makes the reaction proceed more slowly.
127 exam-style questions on AQA GCSE Chemistry 6.1 Rate of reaction, covering 6.1.1a Calculating rates of reactions, 6.1.1b Gradient of a tangent as rate, 6.1.2 Factors which affect the rates of chemical reactions, 6.1.3 Collision theory and activation energy, and 6.1.4 Catalysts. Each one has a worked solution and a mark scheme showing where the marks go.