Question detail
Which comparison keeps calculation separate from a nearby Unit 4.5 idea?
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. calculation: correct Unit 4.5 answer for Energy transfer during exothermic and endothermic reactions
- B. Incorrect comparison: says the two nearby ideas mean the same thing
- C. Incorrect comparison: uses the same evidence for exothermic and endothermic cases
- D. Incorrect comparison: ignores the direction of energy transfer
Answer
The correct option is calculation: correct Unit 4.5 answer for Energy transfer during exothermic and endothermic reactions.
Explanation
The correct option is calculation: correct Unit 4.5 answer for Energy transfer during exothermic and endothermic reactions. It directly supports the approved learning objective to explain why calculation of enthalpy change or ΔH is not required for this GCSE section. This comparison version keeps the answer anchored to Energy transfer during exothermic and endothermic reactions 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
Misunderstanding Enthalpy Change
Students often think that calculating enthalpy change (ΔH) is necessary for all reactions in this section.
Remember that for this GCSE section, it is explicitly stated that the calculation of enthalpy change is not required.
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