AP Chemistry
5.11 Catalysis
5.6 Reaction Energy Profile
5.5 Collision Model
\[ \text{C}_2\text{H}_4\text{(g)} + \text{H}_2\text{(g)} \xrightarrow{\text{Pt(s)}} \text{C}_2\text{H}_6\text{(g)} \]
A proposed particulate-level mechanism for this heterogeneous catalytic process is shown in the four sequential stages below.
Based on the representations, which of the following best explains how the interaction between the reactant molecules and the \(\text{Pt}\) catalyst surface lowers the activation energy (\(E_a\)) of the reaction compared to the uncatalyzed gas-phase reaction?
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