Question detail
Which diagram or label choice best matches reaction profile in this Energy changes subtopic?
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 in a hand-warmer example
- B. Incorrect label: confuses the labelled quantity with activation energy
- C. Incorrect label: places a hand-warmer example on the wrong part of the model
- D. Incorrect label: uses the product/reactant relationship the wrong way round
Answer
The correct option is reaction profile: correct Unit 4.5 answer for Reaction profiles in a hand-warmer example.
Explanation
The correct option is "reaction profile: correct Unit 4.5 answer for Reaction profiles in a hand-warmer example" because it supports the approved learning objective: Draw a simple reaction profile for an exothermic reaction. The other options are incorrect or weaker because they are vague, use the wrong Chemistry context, or do not clearly explain the answer for Reaction profiles.
Common mistake
Mislabeling Reaction Profiles
Students often label the energy change in an exothermic reaction profile incorrectly, indicating that energy is absorbed instead of released.
Remember that in an exothermic reaction, energy is released to the surroundings, so the products should be at a lower energy level than the reactants.
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