Calculate the standard enthalpy change for the reaction of an aqueous solution of barium hydroxide, Ba(OH)2, with

Question:

Calculate the standard enthalpy change for the reaction of an aqueous solution of barium hydroxide, Ba(OH)2, with an aqueous solution of ammonium nitrate, NH4NO3, at 25oC. (Figure 6.1 illustrated this reaction using solids instead of solutions.) The complete ionic equation is
Ba2+(aq) + 2OH(aq) + 2NH4+(aq) + 2NO3(aq) → 2NH3(g) + 2H2O(l) + Ba2+(aq) + 2NO3(aq)