Question detail
A student is revising The energy change of reactions (HT only). Which correction best fixes a mistake about 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 correction: repeats the misconception without fixing the energy idea
- C. Incorrect correction: changes the topic to a different Chemistry unit
- D. Incorrect correction: ignores the named process in The energy change of reactions (HT only)
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 is released when bonds in products are formed. This application 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
Misidentifying bond formation energy
Students often think that forming bonds always requires energy input, so they write that energy is absorbed when bonds in products are formed.
Explain that bond formation releases energy; the energy released is the negative of the bond energy and should be subtracted when calculating the overall energy change.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.