Question detail
What is a common use of exothermic reactions in everyday life?
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. Ice packs for injuries
- B. Self-heating cans
- C. Baking soda and vinegar reactions
- D. Photosynthesis in plants
Answer
Self-heating cans
Explanation
Self-heating cans utilize exothermic reactions to warm their contents without an external heat source.
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.
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