Online I found the plot Gibbs free energy vs. reaction coordinate:
https://en.wikipedia.org/wiki/Transition_state_theory
and on many books I found the plot potential energy vs. reaction coordinate (e.g. page 237 Atkins, Physical Chemistry for the Life Sciences, 2nd Ed).
In the first case activation energy is defined as $\Delta G$, whereas in the second case is defined as difference of potential energy.
Thus is the Gibbs free energy a potential energy?
Thank you very much.
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