Question: are alkanes more stable than alkenes?
Answer: Generally speaking, alkenes are less stable than alkanes. In alkanes, there are only σ bonds (i. e. C-C single bonds and C-H bonds). The bond energy of an average C-C single bond is around 347 kJ/mol, and C-H bond around 308~435 kJ/mol, both of which need a relatively high energy to break.