Hess’s Law

The route doesn’t matter

An interactive lesson with 6 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

• Reactions add like equations; so do their ΔH values.
• Reverse → flip the sign; multiply → multiply ΔH.

Steps

1. Any route, same total
2. Carbon monoxide
3. Reverse it
4. Methane from scratch
5. Read your answer
6. Diamonds aren’t forever