The average bond enthalpy of the OH bond is defined as 1/2 the enthalpy change for the reaction H2O(l)2H(g)+O(g). The formation enthalpies, H for H(g) and O(g) are 218.0 and 249.2kJmol1 respectively, at 298.15K and H for H2O(l) is 241.8kJmol1 at the same temperature Use this information to calculate the average bond enthalpy of the OH bond in water at 298.15K Determine the average bond energy , U, of the H bond in water at 298.15K. Assume ideal gas behaviour