Second Law: In an isolated system, natural processes are spontaneous when they lead to an increase in disorder, or entropy. This statement is restricted to isolated systems to avoid having to worry about whether the reaction is exothermic or endothermic. Do spontaneous processes decrease entropy? In thermodynamics, a spontaneous processRead More →
Due to the absorption of energy when chemical bonds are broken, and the release of energy when chemical bonds are formed, chemical reactions almost always involve a change in energy between products and reactants. … This stored chemical energy, or heat content, of the system is known as its enthalpy.Read More →
spontaneously adverb – Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner’s Dictionary at OxfordLearnersDictionaries.com. What type of word is spontaneously? coming or resulting from a natural impulse or tendency; without effort or premeditation; natural and unconstrained; unplanned: a spontaneous burst of applause. Is spontaneously an adverb of manner?Read More →
So that means that exothermic relates to enthalpy and that spontaneity relates to Gibbs Free Energy. I think that there are some situations that an exothermic reaction is nonspontaneous, like when entropy has a negative value. So I think, in answering your question, no, they are not the same thing.Read More →