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

  • question_answer
    If R = universal gas constant, the amount of heat needed to raise the temperature of 2 mole of an ideal monoatomic gas from 273K to 373K when no work is done [MP PET 1990]

    A)            100 R                                       

    B)            150 R

    C)            300 R                                       

    D)            500 R

    Correct Answer: C

    Solution :

                       \[\Delta Q=\Delta U+\Delta W\]\[\because \]\[\Delta W=0\]Þ \[\Delta Q=\Delta U\]\[=\frac{f}{2}\mu R\Delta T\]            \[=\frac{3}{2}\times 2R(373-273)\]= 300R.


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