posted by Anonymous .
Is the reaction involved in dissolving ammonium chloride in water an endothermic reaction or exothermic reaction? Why?
I am pretty sure it is endothermic, but I am just not sure why ?
It is endothermic because when NH4Cl solid is dissolved in water, the solution becomes colder. The reason it is endothermic is that the energy required to break the NH4Cl crystal structure bonds is greater than the energy emitted when the ions are hydrated.