Why does the desiccant generate heat? The desiccant that generates heat is quicklime desiccant, because the main component of quicklime desiccant is calcium oxide. When calcium oxide meets water, a sharp chemical reaction will occur to generate calcium hydroxide, and a large amount of heat.

Quicklime desiccant is also called CaO. CaO will react with water and explode randomly, so children must pay attention not to play with this desiccant when eating snacks. It will be more troublesome after eating by mistake, and may burn the esophagus.

When the quicklime desiccant absorbs water, a chemical reaction will release heat, because there are only two chemical reactions in nature, one is endothermic (it cannot proceed spontaneously, and a heating device is required for the reaction), and the other is exothermic. Hot (can be done spontaneously). In fact, many desiccants generate heat to a greater or lesser extent. When the desiccant absorbs water, it will release heat when a chemical reaction occurs, and this is a slow reaction process, and the heat will be released slowly, so it will generate heat.