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JIPMER Jipmer Medical Solved Paper-2015

  • question_answer
    One gram sample of \[N{{H}_{4}}N{{O}_{3}}\] is decomposed in a bomb calorimeter. The temperature of the calorimeter increases by 6.12 K. The heat capacity of the system is 1.23 kJ/g/deg. What is the molar heat of decomposition for\[N{{H}_{4}}N{{O}_{3}}\]?

    A)  -7.53 kJ/mol    

    B)     -398.1 kJ/mol   

    C)     -16.1 kJ/mol     

    D)     -602 kJ/mol

    Correct Answer: D

    Solution :

    Heat of decomposition, \[\Delta E=m.s.\,\Delta T\] \[=1\times 1.23\times 6.12=7.5276\text{ }kJ.\] Molar heat of decomposition for\[N{{H}_{4}}N{{O}_{3}}\] \[=7.5276\times 80=602.2\text{ }kJ.\]


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