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NEET Sample Paper NEET Sample Test Paper-36

  • question_answer
    2 moles of ideal gas at \[\text{27 }\!\!{}^\circ\!\!\text{ C}\] temperature is expanded reversibly from 2 litre to 20 litre. Find entropy change (R = 2 cal/mol K).

    A)  92.1         

    B)  0

    C)  4            

    D)  9.2

    Correct Answer: D

    Solution :

    \[\Delta S\](Entropy charge) \[=2.303\,nR{{\log }_{10}}\frac{{{V}_{2}}}{{{V}_{1}}}\] \[=2.303\times 2\times 2{{\log }_{10}}\frac{20}{2}\] \[=2.303\times 2\times 2\times 1=9.212\,cal\]


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