Calculate the standard enthalpy change for the reaction of a

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, NH_4NO_3, at 25 degree C. The complete ionic equation is Ba^2+ (aq) + ZOH^-(aq) + 2NH_4^+ 2NO_3^- (aq) rightarrow 2NH_3(g) + 2H_2O(l) + Ba^2+ (aq) + 2 NO_3^- (aq)

Solution

For the given reaction,

standard enthalpy change dHof,

dHof = dHof(products) - dHof(reactants)

        = (2 x -45.6 + 2 x - 285.8) - (2 x -230 + 2 x -132)

        = +61.2 kJ/mol