In biochemistry, describing a chemical reaction that releases energy rather than requiring it; having negative free energy.
From Greek exergon (working out) plus -gonic (producing), with ex- (out) and ergon (work). This scientific term was coined in the 20th century for thermodynamics.
Exergonic reactions power your cells—they're the opposite of endergonic reactions, and knowing this distinction is key to understanding why organisms need food (to replace the energy released by exergonic processes).
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