The rate of reaction is greater when the temperature of a reaction mixture is increased.
Which statement explains why the rate of reaction is greater at a higher temperature?
The activation energy of the reaction is lowered, which increases the proportion of successful collisions.
The collision frequency increases, and a greater proportion of collisions have energy greater than or equal to the activation energy.
The collision frequency increases, but the proportion of successful collisions remains the same.
The average kinetic energy of the particles increases, which lowers the activation energy of the reaction.
16 exam-style questions on AQA A Level Chemistry Kinetics, covering Collision theory, Maxwell–Boltzmann distribution, Effect of temperature on reaction rate, Effect of concentration and pressure, and Catalysts. Each one has a worked solution and a mark scheme showing where the marks go.