The correct reaction profile diagram for a positive catalyst reaction.

Question

Canvas Classes · Accepted Answer

A positive catalyst (or simply a catalyst) lowers the activation energy of the reaction without changing the overall enthalpy change (). Key features:
- The energy of reactants and products remains the same
- The activation energy () is lower with catalyst
- The transition state energy is lower
-  of reaction is unchanged

The correct profile shows a lower energy barrier (transition state) compared to the uncatalysed reaction, with the same reactant and product energy levels.

Answer: Option (2)

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