I am trying to make sense of these two graphs. They appear to have similar axes, yet display different curves.
Please let me know if this understanding is correct:
In the top image (x-axis = "Reaction coordinate"), this shows the free energy as we convert X equivalents of A to Y equivalent of B (with X and Y relating to the stoichiometric coefficients). So this is looking at an individual reaction essentially.
And for the bottom image (x-axis = "Reaction progress"), this shows the free energy versus the reaction quotient (Q) essentially.
A large part of my confusion is why the bottom image does not indicate activation energy yet the top one does. Does this have to do with Gibbs free energy being a state function. It is true that over the course of the reaction, reactants require some activation energy, but it is not represented in the bottom image since Gibbs free energy is a state function? Perhaps the top image shows the actual "path" taken, while the bottom image just indicates the overall change in Gibbs free energy as Q changes.