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Question

The enthalpy changes at 298K in successive breaking of OH bonds of water are

H2O(g)H(g)+OH(g);ΔH=498kJ mol1

OH(g)H(g)+O(g);ΔH=428kJ mol1
The bond enthalpy of OH bond is:

A
498kJ mol1
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B
428kJ mol1
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C
70kJ mol1
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D
463kJ mol1
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