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NEET Sample Paper NEET Sample Test Paper-46

  • question_answer
    2 mole of ideal gas at \[27{}^\circ C\] temp. is expanded reversibly from 2 lit to 20 lit. Find entropy change in cal -

    A) 92.1

    B)                    0

    C)                    4

    D)                    9.2

    Correct Answer: D

    Solution :

    \[\Delta S\text{ }=2.303\text{ }nR\text{ }log\,\frac{{{V}_{2}}}{{{V}_{1}}}\] \[=\text{ }2.303\times 2\times 2\times log\,\frac{20}{2}\] \[=\,\,9.2\,cal.\]


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