Endothermic Reaction(redirected from Endergonic reaction)
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a chemical reaction that is accompanied by the absorption of heat. Endothermic reactions include dissociation (in particular, the division of molecules into free atoms), photosynthesis in plants, the formation of certain compounds from simple substances, and the process of producing metals from ores by reduction reactions. Endothermic reactions are the reverse of exothermic reactions, during which heat is released.