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JEE Main & Advanced Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank 2nd and 3rd law of thermodynamics and Entropy

  • question_answer
    When enthalpy and entropy change for a chemical reaction are \[-2.5\,\times {{10}^{3}}\,cal\] and \[7.4\,cal\] \[{{\deg }^{-1}}\] respectively. Predict the reaction at \[298\,K\] is [AFMC 1998; MH CET 1999; CBSE PMT 2000]

    A)                 Spontaneous    

    B)                 Reversible

    C)                 Irreversible        

    D)                 Non-spontaneous

    Correct Answer: A

    Solution :

              When \[\Delta H\] = ?ve, \[\Delta S\] = +ve and \[\Delta G\] = ?ve than reaction is spontaneous .


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