Description
This is the most romantic product you will find in this online shop. A little click with the heart and you are charmed.
You receive a heart filled with liquid liquid and a small piece of metal. Bend the piece of metal until you hear a snap, and watch the crystallization unfold and the heat flow. Now the heart will keep you warm for half an hour using an exothermic chemical reaction.
The heart can be reused as many times as you wish. Simply place the crystallized heart in warm water for a few minutes until all its contents have re-liquefied.
That's how it works
VitenWahl's exothermic heart contains a supersaturated solution of sodium acetate, a salt of sodium and acetic acid with the formula NaC2H3O2. Inside the heart is sodium acetate trihydrate, which has a melting point of 58 °C.
But if you continue to heat it up, above 100 °C, the solution becomes supersaturated. Then the solution can be cooled without it solidifying, and that is what has been done with the heart when you receive it. When you "flip" the coin, you create what's called a nucleation point, a place where the supersaturated, liquid solution can start crystallization. The chemical reaction that is started is exothermic. That means it emits heat.
Heart height: 12 cm
Heart thickness: approx. 1 cm