Yes, ammonium chloride is an exothermic compound. This means that when ammonium chloride dissolves in water, it releases heat. The reaction between ammonium chloride and water can be represented by the following equation:

NH4Cl(s) + H2O(l) → NH4+(aq) + Cl-(aq) + heat

The enthalpy change for this reaction is -31.4 kJ/mol, which means that 31.4 kJ of heat is released for every mole of ammonium chloride that dissolves in water.