Question detail
If the forward reaction of a reversible reaction releases 30 kJ of energy, what is the energy change for the reverse reaction?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reversible reactions and dynamic equilibrium
Question
- A. 30 kJ
- B. 60 kJ
- C. 0 kJ
- D. 15 kJ
Answer
30 kJ
Explanation
The correct answer is 30 kJ. This answer directly addresses the question: If the forward reaction of a reversible reaction releases 30 kJ of energy, what is the energy change for the reverse reaction? It matches the approved Chemistry 8462 learning objective and the linked subtopic. The other options are incorrect because they either change the rate, catalyst, reversible reaction, equilibrium, or graph context, or they do not answer the exact point being tested.
Common mistake
Confusing Exothermic and Endothermic
Students often confuse which direction of a reversible reaction is exothermic and which is endothermic.
To fix this, carefully analyze the energy changes described in the reaction and remember that if one direction is exothermic, the opposite direction must be endothermic.
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