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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

428 kJ `mol^(-1)`

C

70 kJ `mol^(-1)`

D

463 kJ `mol^(-1)`

Text Solution

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The correct Answer is:
D
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The enthalpy changes at 298 kJ 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

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H_(2)O(l) rarr H_(2)O(g), DeltaH = +40.7 kJ DeltaH is the heat of ……………..of water.

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OP TANDON-Chemical Thermodynamics and Thermochemistry-Objective Question Level-A
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