Question detail
For Reaction profiles, which answer best supports this AQA GCSE Chemistry Unit 4.5 objective: Explain that the curved line on a reaction profile shows how energy changes as the reaction proceeds?
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. reaction profile: correct Unit 4.5 answer for Reaction profiles
- B. Incorrect: confuses reaction profile 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 reaction profile: correct Unit 4.5 answer for Reaction profiles.
Explanation
The correct option is reaction profile: correct Unit 4.5 answer for Reaction profiles. It directly supports the approved learning objective to explain that the curved line on a reaction profile shows how energy changes as the reaction proceeds. 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
Misinterpreting the reaction profile curve
Students think the curved line on a reaction profile represents the speed of the reaction rather than the change in energy as the reaction proceeds
Explain that the curved line shows the variation in potential energy of the system as reactants convert to products, not the reaction rate
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