Fuel Cells

Burning hydrogen without a flame

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

• Fuel cells: continuously fed galvanic cells; H₂/O₂ gives 1.23 V.
• Max efficiency ΔG/ΔH ≈ 83% for hydrogen.

Steps

1. Combustion, split in two
2. Inside a fuel cell
3. Its voltage
4. Better than a heat engine
5. Where does the hydrogen come from?