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

  • question_answer
    \[C(s)+{{O}_{2}}(g)\,\to \,C{{O}_{2}};\,\,\,\,\Delta H=-94\,kcal\] \[CO(g)+\frac{1}{2}{{O}_{2}}(g)\,\to \,C{{O}_{2}};\,\,\,\Delta H=135.2\,kcal\] Then heat of formation of \[CO(g)\] is   [DCE 2001]

    A)                 ? 26.4 kcal          

    B)                 41.2 kcal

    C)                 26.4 kcal              

    D)                 ? 229.2 kcal

    Correct Answer: D

    Solution :

              By (i) ? (ii) :  \[C+\frac{1}{2}{{O}_{2}}\to CO;\,\,\,\Delta H=-229.2.\]


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