JCECE Medical JCECE Medical Solved Paper-2009

  • question_answer
     A monoatomic gas is suddenly compressed to  \[{{\text{(1/8)}}^{\text{th}}}\]of its initial volume adiabatically. The ratio of its final pressure to the initial pressure is (Given the ratio of the specific heats of the given gas to be 5/3)

    A)  32              

    B)  40/3

    C)  24/5            

    D)  8

    Correct Answer: A

    Solution :

     In an adiabatic process, \[p{{V}^{\gamma }}=\text{constant,}\] \[\Rightarrow \] \[\frac{{{p}_{1}}}{{{p}_{2}}}={{\left( \frac{{{V}_{2}}}{{{V}_{1}}} \right)}^{\gamma }}\] \[\Rightarrow \] \[\frac{{{p}_{1}}}{{{p}_{2}}}={{\left( \frac{1}{8} \right)}^{5/3}}\] \[\Rightarrow \] \[\frac{{{p}_{1}}}{{{p}_{2}}}={{\left( \frac{1}{{{2}^{3}}} \right)}^{5/3}}\] \[=\frac{1}{32}\] \[\therefore \] \[\frac{{{p}_{2}}}{{{p}_{1}}}=32\]


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