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

  • question_answer
    In the reaction for the transition of carbon in the diamond form to carbon in the graphite form, \[\Delta H\] is \[-453.5\,cal\]. This points out that                [BHU 1981; KCET 1986, 89]

    A)                 Graphite is chemically different from diamond

    B)                 Graphite is as stable as diamond

    C)                 Graphite is more stable than diamond

    D)                 Diamond is more stable than graphite

    Correct Answer: C

    Solution :

           \[{{C}_{D}}\to {{C}_{G}}\,,\,\Delta H=-453.5\,\,cal.\]                                 i.e. energy of \[{{C}_{G}}\] is less and thus more stable.


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