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JEE Main & Advanced Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank Heat of reaction

  • 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 \[N{{H}_{4}}N{{O}_{3}}\] [AIIMS 2003]

    A)                 ? 7.53 kJ/mol    

    B)                 ? 398.1 kJ/mol

    C)                 ? 16.1 kJ/mol    

    D)                 ? 602 kJ/mol

    Correct Answer: A

    Solution :

               Molecular weight of \[N{{H}_{4}}N{{O}_{3}}=80\]            Heat evolved \[=1.23\times 6.12\]                                 \[\therefore \]Molar heat capacity \[=1.23\times 6.12\times C\].


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