Question

When the CuSO4 is rehydrated by adding water to the anhydrous compound, is this an endothermic orexothermic reaction? Explain.

Answer 1

when cuso4 .5h2o i.e copper sulfate solution reacts with heat i.e heat is applied to the system dehydration will occur i.e removal of water so it is endothermic reaction and then the anhydrous compound i.e without water molecule is rehydrated adding water molecule to the compound then it produces the heat so it is exothermic

simply all hydration reactions are exothermic reaction here water molecule is added to the test tube containing the anhydrous compound and it form the blue colured compound answer => exothermic reaction