Haha sjjwn hshwh Share with your friends Share 0 Aditi Gupta answered this Solution: Heat of hydrogenation is inversely proportional to the stability of alkene.More stable the alkene less will be the heat of hydrogenation.Among the giiven structures, III is the least stable because it does not contain any type of resonance, hence it will have maximum heat of hydrogenation..Among I and II resonance is present in both the structures but the I structure is conjugated and most substituted thus evolves the least heat.Hence, the correct order is III > II > I 0 View Full Answer