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NEET Sample Paper NEET Sample Test Paper-4

  • question_answer
    When one mole of an ideal gas is compressed to half of its initial volume and simultaneously heated to twice its initial temperature, the change in entropy \[(\Delta \,S)\] is

    A)  \[{{C}_{V}}\] In 2               

    B)  \[{{C}_{P}}\] In 2

    C)  R In 2             

    D)  \[({{C}_{V}}-R)\] In 2

    Correct Answer: D

    Solution :

    \[\Delta S={{C}_{V}}\] In \[\frac{{{T}_{2}}}{{{T}_{1}}}+R\] In \[\frac{{{V}_{2}}}{{{V}_{1}}}\] \[={{C}_{V}}\] In \[2+R\] In \[\frac{1}{2}\] \[={{C}_{V}}\] In \[2-R\] In \[2=\left( {{C}_{V}}-R \right)\] In 2


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