O-LevelChemistryRates of Reaction5070/12 · Oct/Nov 2018 · Q151 Mark
A fuel is completely burned in air. Carbon dioxide, water and heat are produced. Which energy profile diagram is correct for burning a fuel?
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AAn energy profile diagram showing an exothermic reaction where the activation energy is moderate and the energy drop from reactants to products is moderate.
BAn energy profile diagram showing an endothermic reaction where the activation energy is moderate and the energy increases from reactants to products.
CAn energy profile diagram showing an exothermic reaction where the activation energy is moderate and the energy drop from reactants to products is significant.
DAn energy profile diagram showing an exothermic reaction where the activation energy is high and the energy drop from reactants to products is moderate.
✓ Correct answer
C: An energy profile diagram showing an exothermic reaction where the activation energy is moderate and the energy drop from reactants to products is significant.
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