Gibbs Free Energy

The deciding number

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

• ΔG = ΔH − TΔS; spontaneous when ΔG < 0.
• Crossover temperature T = ΔH / ΔS.

Steps

1. Energy versus spreading
2. Only when hot
3. Where ice melts
4. Making lime
5. Never by itself