how do those pocket hand-warmers (that you rub to generate heat) work?
In: Chemistry
Okay, so you know how oxygen interacts with iron to create rust? When that happens, a little bit of heat is released. Those hand warmers work on the same principle, they just have other chemicals to help the iron in them rust *really fast*.
When you shake them, or rub them, you’re exposing more of the filling to oxygen, keeping the reaction going.
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