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Temperature effects in collision theory
A student investigated the effect of increasing the temperature on the rate of a reaction.
Explain the effect of increasing the temperature on the rate of a reaction. Refer to particles and collisions in your answer.
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Marking points
- 1 States that the rate of reaction increases.
- 2 Explains that particles have more energy or move faster.
- 3 Links this to more frequent collisions or to a greater proportion of collisions having enough energy to react.
Full-mark answer
Increasing the temperature increases the rate of reaction. The particles have more kinetic energy and move faster, so collisions happen more frequently and a greater proportion of collisions have enough energy for a reaction.
Why this answer loses marks
The reaction is faster because the particles get hotter.
This does not connect increased particle energy or speed to collision frequency or the chance of a successful collision.