Question detail
For Reaction profiles, which answer best supports this AQA GCSE Chemistry Unit 4.5 objective: Define activation energy as the minimum energy particles need to react?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Exothermic and endothermic reactions
Question
- A. activation energy: correct Unit 4.5 answer for Reaction profiles
- B. Incorrect: confuses activation energy with a nearby Energy changes idea
- C. Incorrect: gives a general chemistry statement without linking to Reaction profiles
- D. Incorrect: reverses the energy-change relationship in Exothermic and endothermic reactions
Answer
The correct option is activation energy: correct Unit 4.5 answer for Reaction profiles.
Explanation
The correct option is activation energy: correct Unit 4.5 answer for Reaction profiles. It directly supports the approved learning objective to define activation energy as the minimum energy particles need to react. This keeps the answer anchored to Reaction profiles within Exothermic and endothermic reactions, and avoids mixing energy transfer, reaction profiles, activation energy, chemical cells, fuel cells, exothermic reactions and endothermic reactions unless the objective names them.
Common mistake
Confusing Activation Energy
Students often confuse activation energy with the overall energy change of a reaction.
Remember that activation energy is the minimum energy required for particles to react, while overall energy change refers to the difference in energy between reactants and products.
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