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JEE Main & Advanced Physics Thermodynamical Processes Question Bank Adiabatic Process

  • question_answer
    In an adiabatic expansion of a gas initial and final temperatures are\[{{T}_{1}}\] and \[{{T}_{2}}\] respectively, then the change in internal energy of the gas is                                                            [MP PET 1997]

    A)   \[\frac{R}{\gamma -1}({{T}_{2}}-{{T}_{1}})\]                       

    B)            \[\frac{R}{\gamma -1}({{T}_{1}}-{{T}_{2}})\]

    C)            \[R({{T}_{1}}-{{T}_{2}})\]

    D)            Zero

    Correct Answer: A

    Solution :

               \[\Delta U=-\Delta W=-\frac{R({{T}_{1}}-{{T}_{2}})}{(\gamma -1)}\]\[=\frac{R({{T}_{2}}-{{T}_{1}})}{\gamma -1}\]


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