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The enthalpy of combustion of H(2(g)) to...

The enthalpy of combustion of `H_(2(g))` to give `H_(2)O_((g))` is `-249 kJ mol^(-1)` and bond enthalpies of `H-H` and `O=O` are `433 mol^(-1)` and `492 kJ mol^(-1)` respectively. The bond enthalpy of `O-H` is

A

`464 kJ mol^(-1)`

B

`-464 kJ mol^(-1)`

C

`232 kJ mol^(-1)`

D

`-232 kJ mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
`DeltaH=H_(R)-H_(P)`
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H_(2)(g) +(1)/(2)O_(2)(g) rarr H_(2)O(g) DeltaH =- 242 kJ mol^(-1) Bond energy of H_(2) and O_(2) is 436 and 500 kJ mol^(-1) , respectively. What is bond energy of O-H bond?

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