Calculate the bond energy of O-H bond in `H_(2)O(g)` at the standard state from the following data:
(1) `H_(2)(g) to 2H(g),DeltaH^(0)=436kJ*mol^(-1)`
(2) `(1)/(2)O_(2)(g)toO(g),DeltaH^(0)=249k*mol^(-1)`
(3) `H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(g),DeltaH_(f)^(0)[H_(2)O(g)]=-241.8kJ*mol^(-1)`.