The bond dissociation energies of $N \equiv N, N=N, O=O \,\&\, N=O$ are $946,418,498$ and $607 \mathrm{~KJ/ mole}$ respectively. If heat of formation of ${N}_2 {O}$ is $82 \mathrm{~KJ/ mole}$ then the magnitude of resonance energy of ${N}_2 {O}$ in $\mathrm{KJ} / \mathrm{mole}$ is ___

$78.5 \mathrm{~KJ} / \mathrm{mole}$

$83 \mathrm{~KJ} / \mathrm{mole}$

$92 \mathrm{~KJ} / \mathrm{mole}$

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NEET UG CHEMISTRY MCQ: THERMODYNAMICS

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The bond dissociation energies of

N \equiv N, N=N, O=O \,\&\, N=O

are

946,418,498

and

607 \mathrm{~KJ/ mole}

respectively. If heat of formation of

{N}_2 {O}

82 \mathrm{~KJ/ mole}

then the magnitude of resonance energy of

{N}_2 {O}

\mathrm{KJ} / \mathrm{mole}

is ___

View answer and explanation

Correct option: C

88 \mathrm{~KJ} / \mathrm{mole}

Option C (88 kJ/mole) is correct because the resonance energy is calculated by subtracting the experimental heat of formation from the calculated heat of formation based on bond energies.

NEET UG CHEMISTRY MCQ: THERMODYNAMICS

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