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

  • question_answer
    The heat of formation of methane \[C(s)+2{{H}_{2}}(g)\,\to \,C{{H}_{4}}(g)\] at constant pressure is 18500 cal at \[{{25}^{o}}C\]. The heat of reaction at constant volume would be           [MH CET 2000]

    A)                 17904 cal             

    B)                 18202 cal

    C)                 18798 cal             

    D)                 19096 cal

    Correct Answer: D

    Solution :

           \[\Delta H=18500=\Delta E+\Delta nRT\]                                 or \[18500=\Delta E+(-1)\times 2\times 298=19096\,cal\].


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