Question detail
Which statement gives the clearest definition of HT only in The energy change of reactions (HT only)?
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. HT only: correct Unit 4.5 answer for The energy change of reactions (HT only)
- B. Incorrect definition: treats HT only as a general chemistry label
- C. Incorrect definition: moves the answer outside The energy change of reactions (HT only)
- D. Incorrect definition: reverses the energy-transfer wording
Answer
The correct option is HT only: correct Unit 4.5 answer for The energy change of reactions (HT only).
Explanation
The correct option is HT only: correct Unit 4.5 answer for The energy change of reactions (HT only). It directly supports the approved learning objective to (HT only) State that energy must be supplied to break bonds in reactants. This definition version keeps the answer anchored to The energy change of reactions (HT only) 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
Confusion about Bond Breaking
Students often state that energy is released when bonds in reactants are broken, rather than recognizing that energy must be supplied to break these bonds.
Remember that breaking bonds requires energy input, while forming bonds releases energy. Focus on the distinction between these processes.
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