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11th Class Physics Thermodynamical Processes Question Bank Critical Thinking

  • question_answer
    For a hypothetic reaction \[A\to B\], the activation energies for forward and backward reactions are 19 kJ/mole and 9 kJ/mole respectively. The heat of reaction is [CBSE PMT 2000]

    A)                 28 kJ     

    B)                 19 kJ

    C)                 10 kJ     

    D)                 9 kJ

    Correct Answer: C

    Solution :

              \[\Delta H={{E}_{a}}\] for forward reaction \[-{{E}_{a}}\] for backward reaction \[=19-9=10\,kJ\].


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