Changes in bond energy play a big role in how chemicals work in real life. They can affect how fast reactions happen and how stable things are. Let’s break it down:

1. Bond Energies:

   • The energy it takes to break different types of bonds can vary. Here are some examples:
     • C–C bond: about 348 kJ/mol
     • C–H bond: about 412 kJ/mol
     • O=O bond: about 498 kJ/mol

2. Stability:

   • Stronger bonds mean the substance is more stable.
   • On the other hand, substances with weaker bonds are usually more reactive.
   • For example, alkenes, which have double bonds (C=C bonds, around 612 kJ/mol), are more reactive than alkanes, which have single bonds (C–C bonds).

3. Applications:

   • In everyday life, we see this when fuels burn. They break weaker bonds, which lets out energy. This happens a lot with hydrocarbons.
   • In medicine, drug makers pay attention to bond energies. They target certain bonds to make their medicines work better.

Knowing how bond energy varies is important. It helps scientists create better reactions and materials.