If a chemical reaction's activation energy decreases due to the addition of a catalyst, what happens to the reaction's enthalpy change?

💡 Explanation

The catalyst lowers the activation energy by providing an alternate reaction pathway, but it does not affect the energy levels of the reactants or products; therefore, the enthalpy change, which depends only on the initial and final states, remains the same, rather than changing its magnitude or sign because the catalyst's presence doesn't alter those energy states.

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