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

  • question_answer
    For the reaction \[{{H}_{2}}O(s)\] ⇌ \[{{H}_{2}}O(l)\] at \[{{0}^{o}}C\] and normal pressure        [KCET 2001]

    A)                 \[\Delta H>T\Delta S\]  

    B)                 \[\Delta H=T\Delta S\]

    C)                 \[\Delta H=\Delta G\]   

    D)                 \[\Delta H<T\Delta S\]

    Correct Answer: B

    Solution :

           \[{{H}_{2}}{{O}_{(g)}}\]⇌\[{{H}_{2}}{{O}_{(l)}}\]            we know \[\Delta G=\Delta H-T\Delta S\]            at equilibrium \[\Delta G=0\]                                 Therefore \[\Delta H=T\Delta S\].


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