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NEET AIPMT SOLVED PAPER 1998

  • question_answer
                    One mole of an ideal gas at 300K is expanded isothermally from an initial volume of 1 L to 10L.  The \[\Delta E\]for     this process is \[(R=2\,cal\,mo{{l}^{-1}}{{K}^{-1}})\]                                                                       

    A)                 163.7 cal                              

    B)                 zero                                      

    C)                 1381.1 cal            

    D)                 9 L atm

    Correct Answer: B

    Solution :

                    Isothermal means temperature is constant.                 At constant temperature, change in internal energy \[(\Delta E)\]remains constant.                 So,   \[\Delta E=0\]


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