Bond Enthalpies

Breaking costs, making pays

An interactive lesson with 5 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• ΔH ≈ bonds broken − bonds formed (average bond enthalpies).
• Strong bonds in the products make a reaction exothermic.

Steps

1. An energy ledger
2. Burning methane, bond by bond
3. Hydrogen chloride
4. Only an estimate
5. Why fuels burn hot