When Is a Reaction Endergonic?

Endergonic: A process such as a chemical reaction in which the Gibbs free energy (G) of the products is greater than the Gibbs free energy of the reactants (i.e., ΔG > 0). Work (energy) must be absorbed from the surroundings for the reaction to proceed.

Under what conditions does an endergonic reaction occur?

Reactions with a positive ∆G (∆G > 0), on the other hand, require an input of energy and are called endergonic reactions. In this case, the products, or final state, have more free energy than the reactants, or initial state.

Is this reaction endergonic or exergonic?

In an endergonic reaction, energy is stored in the products. In an exergonic reaction, energy is released to the environment. The released energy exceeds activation energy, making exergonic reactions spontaneous. Endergonic and exergonic reactions are defined according the change in Gibbs free energy.