Stability of Alkenes Measured by heat of hydrogenation: Alkene H2->Alkane energy More heat released,higher energy alkene. difference 2.7 kcal (11 kJ) 30.3kcal(127kJ) 27.6 kcal (115 kJ) reaction coordinate Stability of Alkenes ❖Measured by heat of hydrogenation: Alkene + H2 → Alkane + energy ❖More heat released, higher energy alkene