How to make a simple pocket hot pack in 2 mins [2021] 

hello in this video with calcium Chloride and distilled water mixes and reacts to give off heat and can be used as hot pack.
What is calcium Chloride(CaCl2) : Calcium chloride is an inorganic compound, a salt with the chemical formula CaCl2. It is a colorless crystalline solid at room temperature, highly soluble in water.
Calcium chloride is commonly encountered as a hydrated solid with generic formula CaCl2(H2O)x, where x = 0, 1, 2, 4, and 6. These compounds are mainly used for de-icing and dust control. Because the anhydrous salt is hygroscopic, it is used as a desiccant.
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Distilled water : Distilled water is water that has had many of its impurities removed through distillation. Distillation involves boiling the water and then condensing the steam into a clean container.
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