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A reaction having equal energies of activation for forward and reverse reaction has:

1. ΔG = 0
2. ΔH = 0
3. ΔH = ΔG = ΔS = 0
4. ΔS = 0

Correct answer: ΔH = 0

Solution

If the activation energies for the forward and reverse reactions are equal, the enthalpy change (ΔH) of the reaction is zero because there is no net energy difference between reactants and products.

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