Characterized or formed by the absorption of heat during chemical reactions or transformations. Acetylene gas, for example, is an endothermic substance; heat is absorbed during the production of acetylene and later liberated during combustion.
Characterized or formed by the absorption of heat during chemical reactions or transformations. Acetylene gas, for example, is an endothermic substance; heat is absorbed during the production of acetylene and later liberated during combustion.