The accompanying diagram shows how the free energy, G, changes during a hypothetical rea...

The accompanying diagram shows how the free energy, G, changes during a hypothetical reaction . On the left are pure reactants, each at 1 atm, and on the right is the pure product, also at 1 atm. (a) What is the significance of the minimum in the plot? (b) What does the quantity x, shown on the right side of the diagram, represent? [Section 19.7]