Heat In, Heat Out

Exothermic and endothermic

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

• Exothermic: ΔH < 0 (heat out). Endothermic: ΔH > 0 (heat in).
• ΔH scales with amounts and depends on states.

Steps

1. Hot packs and cold packs
2. The cold pack
3. Burning gas
4. Per mole of what?
5. Steam or water?
6. Rocket fuel