NEET Sample Paper NEET Sample Test Paper-25

  • question_answer
    A mono atomic gas is supplied with the heat Q very slowly keeping the pressure constant. The work done by the gas will be

    A)  \[\frac{2}{3}Q\]           

    B)  \[\frac{3}{5}Q\]

    C)  \[\frac{2}{5}Q\]           

    D)  \[\frac{1}{5}Q\]

    Correct Answer: C

    Solution :

     \[\Delta Q=\Delta U+\Delta W\] \[\Rightarrow \]\[\Delta W={{(\Delta Q)}_{P}}-\Delta U={{(\Delta Q)}_{P}}\left[ \frac{1-{{(\Delta Q)}_{V}}}{{{(\Delta Q)}_{P}}} \right]\] \[={{(\Delta Q)}_{P}}\left[ 1-\frac{{{C}_{V}}}{{{C}_{P}}} \right]=Q=\left[ 1-\frac{3}{5} \right]=\frac{2}{5}Q\]             \[\because \]\[{{(\Delta Q)}_{P}}=Q\]and \[\gamma =\frac{5}{3}\]for monatomic gas


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