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

  • question_answer
    One mole of an ideal gas is expanded isothermally and reversibly to half of its initial pressure. \[\Delta S\] for the process in \[J\text{ }{{K}^{-1}}\text{ }mo{{l}^{-1}}\] is \[[ln2=0.693\,and\,R=8.314,J/(mol\,K)]\]

    A) 6.76                 

    B) 5.76

    C) 10.76               

    D) 8.03

    Correct Answer: B

    Solution :

    [b] For isothermal process \[\left( \Delta T=0 \right)\] \[\Delta S=R\ell n\frac{{{P}_{1}}}{{{P}_{2}}}=8.314\ell n\,2\,\] \[=8.314\times 0.693=5.76\]


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