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H(2)(g) + (1)/(2)O(2)(g) rarr H(2)O(g) D...

`H_(2)(g) + (1)/(2)O_(2)(g) rarr H_(2)O(g) Delta H = -242 kJ mol^(-1)`. Bond energy of `H_(2)` and `O_(2)` are `436 mol^(-1)` and `500 mol^(-1)` respectively. What is the bond energy of the O-H bond ?

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`H_(2)(g) + (1)/(2)O_(2)(g) rarr H_(2)O(g) , Delta_(f)H^(@) = -242 kJ mol^(-1)`
H = Bond energy of reaction - Bond energy of products
`Delta H = B_(H-H) + (1)/(2)B_(O-O) - 2B_(O-H) , -242 kJ = 436 + (1)/(2)(500) - 2B_(O-H) hArr -928 kJ = -2B_(O-H), B_(O-H) = (928)/(2) = 464 kJ mol^(-1)`.
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