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The enthalpies for the following reactio...

The enthalpies for the following reactions `(DeltaH^(Theta))` at `25^(@)C` are given below.
a. `(1)/(2)H_(2)(g) +(1)/(2)O_(2)(g) rarr OH(g)`
`DeltaH = 10.06 kcal`
b. `H_(2)(g) rarr 2H(g), DeltaH = 104.18 kcal`
c. `O_(2)(g) rarr 2O(g), DeltaH = 118.32 kcal`
Calculate the `O-H` bond energy in the hydroxyl radical.

Text Solution

Verified by Experts

`Delta H^(@) = sum BE ("reactants") - sum BE("products")`
`implies -10.06 = 1/2 (104.18) + 1/2(118.32) - BE (O - H)`
`BE (O - H) = 121.21 kcal`
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