Question Constellation Sign up for free AQA · GCSE · Chemistry · Higher
Temperature effect on reaction rate
Explain how increasing the temperature would affect the rate of reaction between zinc and sulfuric acid.
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Marking points
- 1 States that increasing temperature increases the reaction rate.
- 2 Explains that particles have more energy or move faster.
- 3 Links this to more frequent collisions or a greater proportion of collisions having enough energy to react.
Full-mark answer
Increasing the temperature increases the reaction rate. The particles have more kinetic energy and move faster, so collisions happen more frequently and a greater proportion of collisions have enough energy to react.
Why this answer loses marks
Higher temperature gives particles more energy, so the reaction is faster.
This needs the missing collision link: particles collide more often or a greater fraction of collisions exceeds the activation-energy barrier.