When ammonium chloride dissolves in water, the solution becomes colder. (a) is the solution process exothermic or endothermic? (b) why does the solution form?

The solution process is exothermic because when solution become colder heat energy is released which make the process exothermic. The exothermic process is the process in which heat is released. The solution forms inorder to separate NH4 + ions and Cl - ions