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The enthalpy changes at 298 K in succes...

The enthalpy changes at 298 K in successive breaking of `O-H` bonds of water, are
`H_(2)O(g) rarr H(g)+OH(g),DeltaH=498kJ mol^(-1)`
`OH(g) rarr H(g)+O(g), DeltaH =428 kJ mol^(-1)`
The bond energy of the O-H bond is

A

`498 " kJ mol "^(-1)`

B

`463" kJ mol "^(-1)`

C

`428 " kJ mol "^(-1)`

D

`70 " kJ mol "^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
Average value` =(498+428)/2` =463kj
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