A formal statement that any spontaneousCapable of proceeding without an outside source of energy; refers to a reaction in which the products are thermodynamically favored (product-favored reaction). (productA substance produced by a chemical reaction.-favored) process is accompanied by an increase in the entropyA thermodynamic state function, symbol S, that equals the reversible heat energy transfer divided by temperature; higher entropy corresponds to greater dispersal of energy on the molecular scale. See also standard entropy. (dispersal of energyA system's capacity to do work.) of the universe.
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