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NEET Sample Paper NEET Sample Test Paper-7

  • 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\[6.12\text{ }K\]. The heat capacity of the system is\[1.23\text{ }kJ/g/deg\]. What is the molar heat of decomposition for \[N{{H}_{4}}N{{O}_{3}}\]?

    A)  \[-7.53\text{ }kJ/mol\]

    B)  \[-398.1\text{ }kJ/mol\]

    C)  \[-16.1\text{ }kJ/mol\]

    D)  \[-\text{ }602\text{ }kJ/mol\]

    Correct Answer: D

    Solution :

    Heat evolved from decomposition of \[1g\] \[N{{H}_{4}}N{{O}_{3}}\] \[=1.23\times 6.12\,kJ\] Heat evolved from \[1\text{ }mol\] of \[N{{H}_{4}}N{{O}_{3}}\] (i.e. 80 g)             \[=1.23\times 6.12\times 80=602\,kJ\]


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