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Tutorial de Low-tech with Refugees - Low-tech & Réfugiés | Catégories : Outils
Low-tech with Refugees - Low-tech & Réfugiés
Hand heater
Hand heater
Chaleur, Cuisine, Chimie
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).
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.
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).
Bring the water to the boil and melt the mixture in the flask at a low temperature until the mixture is liquid.
Ajouter le trombone et malaxer par la suite le sachet, pour entraîner la cristallisation d'acétate de sodium qui, étant exothermique, va nous fournir de la chaleur !
Afin de la réutiliser, répéter l'etape 4 et 5.
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