JEE Main & Advanced JEE Main Paper (Held on 10-4-2019 Morning)

  • question_answer n moles of an ideal gas with constant volume heat capcity \[{{C}_{V}}\]undergo an isobaric expansion by certain volume. The ratio of the work done in the process, to the heat supplied is: [JEE Main 10-4-2019 Morning]

    A) \[\frac{4nR}{{{C}_{V}}-nR}\]        

    B) \[\frac{nR}{{{C}_{V}}-nR}\]

    C) \[\frac{nR}{{{C}_{V}}+nR}\]        

    D) \[\frac{4nR}{{{C}_{V}}+nR}\]

    Correct Answer: C

    Solution :

    \[w=nR\Delta T\]           \[\Delta H=({{C}_{\text{v}}}+nR)\Delta T\]           \[\frac{\text{w}}{\Delta H}=\frac{nR}{{{C}_{\text{v}}}+nR}\]     

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