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NEET Sample Paper NEET Sample Test Paper-11

  • question_answer
    The molar heat capacity of water at constant pressure P, is \[75\,J{{K}^{-1}}\,mo{{l}^{-1}}.\]When\[1.0\,kJ\]of heat is supplied to 100 g of water which is free to expand, the increase in temperature of water is

    A)  1.2 K                           

    B)  2.4 K

    C)  4.8 K                           

    D)  6.6 K

    Correct Answer: B

    Solution :

     \[C=\frac{q}{m({{T}_{2}}-{{T}_{1}})}\] Given that \[C=75\,J\,{{K}^{-1}}\,mo{{l}^{-}},\] \[Q=1.0\,kJ=1000\,J\] \[75=\frac{1000}{5.55\times \Delta T}\left( m=\frac{1000}{18}=5.55 \right)\] \[\therefore \]      \[\Delta T=\frac{1000}{5.55\times 75}=2.4\,K\]


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