An exergonic reaction has negative molar reaction change in Gibbs free energy under the specified conditions. At fixed temperature and pressure, its forward direction is thermodynamically favourable; its reaction rate remains a separate question. See OpenStax Biology 2e, 6.2: exergonic reactions.
An exergonic reaction is a type of chemical reaction that releases energy as it proceeds. The term "exergonic" comes from the Greek words "ex," meaning "out of," and "ergon," meaning "work" or "energy." In biochemical terms, these reactions are characterized by a negative change in free energy (ΔG < 0), indicating that the products of the reaction have lower free energy than the reactants.
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