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 25°C. The complete ionic equation is
Ba2+(aq) + 2OH- (aq) +2NH4+(aq) +2NO3 - (aq) à2NH3(g) + 2H2O(l) + Ba2+ (aq) + 2NO3 -(aq)