O-LevelChemistryRates of Reaction5070/11 · May/June 2017 · Q161 Mark
The energy profile diagram for the forward direction of a reversible reaction is shown. For the reverse reaction, which row correctly shows the sign of the activation energy and the type of enthalpy change?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Anegative sign of activation energy, endothermic type of enthalpy change
Bnegative sign of activation energy, exothermic type of enthalpy change
Cpositive sign of activation energy, endothermic type of enthalpy change
Dpositive sign of activation energy, exothermic type of enthalpy change
✓ Correct answer
D: positive sign of activation energy, exothermic type of enthalpy change
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