Are all exothermic reactions spontaneous?
1 Answer
Oct 5, 2015
Take the example of formation of water from Hydrogen, Oxygen this reaction highly exothermic but kinetically slow
Explanation:
The reaction to proceed first the reactants have to cross their activation energy barrier so that they form products giving the energy. Hence catalyst or temperature of the process plays a role in reaction to proceed spontaneously
The other example is burning of LPG gas requires ignition for reaction to gets started even though reaction is spontaneous.
Here is a video that explains spontaneity and signs of enthalpy and entropy:
