Enthalpies of Formation

One table for every reaction

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

• ΔHf°: one mole from elements; elements are zero.
• ΔH° = Σ products − Σ reactants (times coefficients).

Steps

1. Measuring from sea level
2. Why zero?
3. Burning ethanol
4. Thermite
5. The most stable oxide