From the following bond energies: [AIPMT (S) 2009] |
\[H-H\] bond energy: 431.37 kJ \[mo{{l}^{-1}}\] |
\[C=O\] bond energy: 606.10 kJ \[mo{{l}^{-1}}\] |
\[C-C\] bond energy: 336.49 kJ \[mo{{l}^{-1}}\] |
\[C-H\] bond energy: 410.50 kJ \[mo{{l}^{-1}}\] |
Enthalpy for the reaction, |
\[\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}}}\,=\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}}}\,+H-\xrightarrow{{}}H-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}}}\,-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}}}\,-H\] will be |
A) \[1523.6\,kJ\,mo{{l}^{-1}}\]
B) \[-243.6\,kJ\,mo{{l}^{-1}}\]
C) \[-120.0\,kJ\,mo{{l}^{-1}}\]
D) \[553.0\,kJ\,mo{{l}^{-1}}\]
Correct Answer: C
Solution :
Key Idea, Enthalpy of reaction |
For reaction, |
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