Boiling an egg – with chemistry!
How to boil an egg using calcium oxide
Watch out – here comes an extremely hot experiment!
Warning! All experiments portrayed in this video are performed by professionals. Do not attempt.
Reagents and equipment
- heat-resistant bowl;
- calcium oxide;
Pour some calcium oxide into a heat-resistant bowl. Place an egg on top and press it slightly into the powder. Fill the bowl with water. The mixture quickly heats up and boils. When the reaction stops and the mixture cools down, retrieve the egg and rinse it with water. Peel and cut the egg — it’s now perfectly hard-boiled! Do not eat eggs prepared with this method; they may contain chemicals.
The formation of new chemical bonds sometimes releases a large amount of energy in the form of heat and occasionally light. Reactions that release heat into the surrounding environment are called exothermic reactions. Water reacts with calcium oxide to form calcium hydroxide.
СаО + Н₂О = Са(ОН)₂ + Q
During this reaction, so much heat is released that the liquid boils and the egg is cooked.
This experiment is dangerous. But you can find many more cool, safe experiments in the MEL Chemistry subscription!