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  5. Thermodynamical Processes

11th Class Physics Thermodynamical Processes Question Bank Critical Thinking

  • question_answer
    The equilibrium constant of a reaction at \[298\,K\] is \[5\times {{10}^{-3}}\] and at \[1000\,K\] is \[2\times {{10}^{-5}}\]. What is the sign of \[\Delta H\] for the reaction     [Pb. CET 1998]

    A)                 \[\Delta H=0\]  

    B)                 \[\Delta H\] is negative

    C)                 \[\Delta H\] is positive  

    D)                 None of these

    Correct Answer: B

    Solution :

              Equilibrium constant is decreases with temperature and \[\Delta H\] is also decreases so it is ?ve.


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