A catalyst — Surface Chemistry Chemistry Question

💡 Solution & Explanation

A catalyst provides an alternative pathway with lower activation energy, speeding up both forward and reverse reactions equally. The Gibbs free energy change ($\Delta G$) depends only on initial and final states (a thermodynamic state function), so a catalyst does NOT alter $\Delta G$, $\Delta H$, or $\Delta S$. Correct option: $\boxed{C}$