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AP Chemistry
5.11 Catalysis
5.10 Multistep Reaction Energy Profile
5.6 Reaction Energy Profile
IntermediateMCQGraphicalConceptual23.8k
A reaction energy profile graph plotted on bare axes without gridlines. The vertical axis is labeled Potential Energy (kJ/mol) and the horizontal axis is labeled Reaction Coordinate. A flat horizontal plateau at 20 kJ/mol represents the reactants, and a flat horizontal plateau at 0 kJ/mol represents the products. A solid black curve labeled Uncatalyzed pathway rises from 20 kJ/mol to a single smooth peak at 100 kJ/mol before descending to 0 kJ/mol. A dashed black curve labeled Catalyzed pathway starts at 20 kJ/mol, rises to a first peak at 55 kJ/mol, dips to a shallow local minimum at 35 kJ/mol, rises to a second peak at 60 kJ/mol, and descends to 0 kJ/mol. No other lines, labels, shaded regions, or annotations appear.
Potential energy profiles for the uncatalyzed and catalyzed ester hydrolysis pathways.
The potential energy profiles for the aqueous hydrolysis of an ester in the presence and absence of an acid catalyst are shown in the diagram below.

\[ \text{CH}_3\text{COOCH}_3\text{(aq)} + \text{H}_2\text{O(l)} \rightarrow \text{CH}_3\text{COOH(aq)} + \text{CH}_3\text{OH(aq)} \]

Which of the following statements is best supported by the reaction energy profiles?

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