Chemistry · May / June 2025 · Paper 12 · Question 15
5070Exothermic and endothermic reactions
A reaction pathway diagram is shown. [diagram: energy vs progress of reaction, reactants lower than products, with activation energy hump] Which equation does the reaction pathway diagram show?
- A2H(g) + O(g) → H₂O(g)
- BH₂(g) → 2H(g)
- CH₂O(g) → H₂O(l)
- D2O(g) → O₂(g)
As printed in the paper
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Correct answer: B. H₂(g) → 2H(g)
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