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JIPMER Jipmer Medical Solved Paper-2010

  • question_answer
    What is the\[\Delta H\]of the reaction \[H-\underset{Cl}{\overset{H}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-Cl(g)\to C(g)+2H(g)+2Cl(g)?\] The average bond energies of C -Cl bond and C-H bond are 416 kJ and 325 kJ\[mo{{l}^{-1}}\] respectively.

    A)  1482 kJ                                

    B)  1482 J                  

    C)  1492 kJ                                

    D)  1492 J

    Correct Answer: A

    Solution :

    In the reaction, two moles of \[C-H\] bonds and two moles of \[C-Cl\] bonds are broken. Hence, energy absorbed \[=2\times 416+2\times 325\] \[=1482\,kJ\]


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