|Reaction coordinate showing two possible directions of spontaneous reactions; the region in red depicting a reaction quantified by a negative free energy change (ΔG < 0) of products on going to reactants, otherwise referred to as an exergonic reaction. |
For isothermal-isobaric (typical earth-bound) systems, negative free energy change is stated mathematically as:
where the symbol ΔG or free energy change is defined mathematically as:
1. Thims, Libb. (2007). Human Chemistry (Volume One) (graph, pg. 113). Morrisville, NC: LuLu.