| Bond | Bond energy |
| \[C=C\] | 619 |
| \[C-H\] | 414 |
| \[O=O\] | 499 |
| \[C=O\] | 724 |
| \[O-H\] | 660 |
A) \[+\,964 kJ mo{{l}^{-}}^{1}\]
B) \[-\,964 kJ mo{{l}^{-}}^{1}\]
C) \[-\,3772 kJ mo{{l}^{-}}^{1}\]
D) \[+\,3772 kJ mo{{l}^{-}}^{1}\]
Correct Answer: B
Solution :
\[\Delta H = Sum of bond energy of products\] Sum of bond energy of reactants \[=\,\,\,[\Delta {{H}_{(c=c)}}+ 4\Delta {{H}_{(C-H)}} + 3\times \Delta {{H}_{O=O}}]\] \[-\,[4 \times \Delta {{H}_{C\,=\,O}}+4\times \Delta {{H}_{O-H}}]\] \[= \left[ 619 + 4 \times 414 + 3 \times 499 \right] - \left[ 4 \times 724 +4 \times 460 \right]\]\[=\,\,\,-964kJ\,mo{{l}^{-}}^{1}\]
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