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NEET Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank Self Evaluation Test - Thermodynamics

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

    A) 92.1                 

    B) 0    

    C) 4                                 

    D) 9.2

    Correct Answer: D

    Solution :

    [d] Entropy change at constant temperature \[=2.303nR\,log\frac{{{V}_{1}}}{{{V}_{2}}}=2.303\times 2\times 2\log \frac{20}{2}\] \[=9.2\text{ }cal\text{ }{{K}^{-1}}mo{{l}^{-1}}\]


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