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JEE Main & Advanced Physics Thermodynamical Processes Question Bank First Law of Thermodynamics

  • question_answer
    A container of volume \[1{{m}^{3}}\]is divided into two equal compartments by a partition. One of these compartments contains an ideal gas at 300 K. The other compartment is vacuum. The whole system is thermally isolated from its surroundings. The partition is removed and the gas expands to occupy the whole volume of the container. Its temperature now would be                                                            [Manipal MEE 1995]

    A)            300 K                                       

    B)            239 K

    C)            200 K                                       

    D)            100 K

    Correct Answer: A

    Solution :

               This is the case of free expansion and in this case \[\Delta W=0\], \[\Delta U=0\] so temperature remains same i.e. 300 K.


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