NEET Chemistry Covalent Bond MCQ Question
Calculate the average bond enthalpy for the O-H bonds in a water molecule if the dissociation enthalpies for H2O(g) → H(g) + OH(g) and OH(g) → H(g) + O(g) are 502 kJ mol–1 and 427 kJ mol–1, respectively.
464.5 kJ mol–1
429.5 kJ mol–1
502 kJ mol–1
427 kJ mol–1
Correct Answer
Detailed Explanation
The average bond enthalpy is calculated by taking the sum of the dissociation enthalpies and dividing by the number of bonds, i.e., (502 + 427) / 2 = 464.5 kJ mol–1.
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