JEE Main & Advanced Physics Thermodynamical Processes Question Bank Adiabatic Process

  • question_answer
    An ideal gas is expanded adiabatically at an initial temperature of 300 K so that its volume is doubled. The final temperature of the hydrogen gas is \[(\gamma =1.40)\]  [MP PMT 1995; DPMT 1999]

    A)            227.36 K                                 

    B)            500.30 K

    C)            454.76 K                                 

    D)            \[-{{47}^{o}}C\]

    Correct Answer: A

    Solution :

                       \[T{{V}^{\gamma -1}}=\]constant Þ \[\frac{{{T}_{2}}}{{{T}_{1}}}={{\left( \frac{{{V}_{1}}}{{{V}_{2}}} \right)}^{\gamma }}\]Þ \[{{T}_{2}}={{T}_{1}}{{\left( \frac{{{V}_{1}}}{{{V}_{2}}} \right)}^{\gamma }}\]            \[\Rightarrow {{T}_{2}}=300{{\left( \frac{1}{2} \right)}^{0.4}}=227.36\ K\]


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