Exothermic Detergent Reaction

Interesting chemical reactions don't necessarily require a chemistry lab and expensive glassware. For example, you can experience an exothermic chemical reaction using nothing more complicated than a handful of laundry detergent powder and a bit of water. An exothermic reaction is one which produces heat as chemical bonds are broken and release energy. Experience the phenomenon the next time you are washing clothes. Just let a little water dampen the detergent before you add it to the washer (and then rinse your hands really well). Fun!
Endothermic & Exothermic Reactions | Exothermic Rxn with Steel Wool