When ammonium chloride is dissolved in water, the beaker gets cold. which type of reaction does this describe? exothermic endothermic both exothermic and endothermic neither exothermic nor endothermic?

When Ammonium chloride is dissolved in water the temperature of the solution decreases. It means that the reaction is endothermic. It absorbs the heat from the surrounding. In fact, bond breakage is always an endothermic reaction. In this case ammonium and chloride ions require heat to breakup, on the other hand water molecules always absorbs heat to break intermolecular forces in order to give space to the new coming species (i.e. Ions). And then new interactions are formed between new ions and water molecules with the elimination of heat. But this heat evolved is less than the heat absorbed and overall heat is being absorbed. Hence, it is an endothermic process.

A.

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