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Version actuelle datée du 14 août 2024 à 12:23
Difficulté
Facile
Durée
1,5 heure(s)
Coût
1 EUR (€)
Description
Hand heater
Matériaux
- 500 ml White vinegar
- 35 Baking soda
-500 ml Boiling water
Outils
-Coffee filter
-Spoon
-Saucepan
-Sachet
-Funnel
-Trombone
Étape 1 -
Put 500mL of vinegar in a container and gently add the bicarbonate of soda (you will see a gas being released as it foams, this is carbon dioxide).
Étape 2 -
Pour this solution into the 500mL of boiling water in the pan and allow the solution to evaporate: you will notice crystals forming at the bottom of the pan.
Étape 3 -
Remove the crystals from the bottom of the saucepan and crush them so that they fit into the container (in this case, the Pompotes flask).
Étape 4 -
Bring the water to the boil and melt the mixture in the flask at a low temperature until the mixture is liquid.
Étape 5 -
Leave the sachet to stand in the open air, avoiding any shocks.
Étape 6 -
Add the paperclip and then stir the sachet to crystallize the sodium acetate which, being exothermic, will provide us with heat!
Étape 7 -
To reuse it, repeat steps 4 and 5.
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