I need an example of an endothermic and an extothermic reaction?

An endothermic reaction is any chemical reaction that absorbs heat from its environment. Ex: the reaction of barium hydroxide octahydrate crystals with dry ammonium chloride,dissolving ammonium chloride in water Ex exothermic: any combustion reaction, neutralization reaction,rusting of iron (rust steel wool with vinegar)the thermite reaction.

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