In the extraction of aluminium from bauxite in Guyana, the Bayer process operates at high temperatures. According to collision theory, why does increasing temperature increase the rate of reaction?

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Question

In the extraction of aluminium from bauxite in Guyana, the Bayer process operates at high temperatures. According to collision theory, why does increasing temperature increase the rate of reaction?

Accepted Answer

Higher temperature increases the frequency and energy of collisions between particles — Award 1 mark for explaining that increased temperature gives particles more kinetic energy, resulting in more frequent collisions and a greater proportion of collisions exceeding activation energy. A is incorrect — mass of particles is unchanged. B is incorrect — temperature does not change activation energy (catalysts do). D is incorrect — temperature does not affect surface area.

Answer

Higher temperature increases the frequency and energy of collisions between particles

Answer

Higher temperature increases the mass of reacting particles

Answer

Higher temperature decreases the activation energy of the reaction

Answer

Higher temperature increases the surface area of the reactants

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