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Manipal Medical Manipal Medical Solved Paper-2005

  • question_answer
    In an energy recycling process,\[X\text{ }g\]of steam at \[100{}^\circ C\]becomes water at\[100{}^\circ C\] which converts V g of ice at\[0{}^\circ C\]into water at\[100{}^\circ C\]. The ratio of X & Y will be:

    A)  \[\frac{1}{3}\]

    B)  \[\frac{2}{3}\]

    C)  3                

    D)  2

    Correct Answer: A

    Solution :

     Specific heat of water\[=4200\text{ }J/kg-K\] Specific   latent   heat   of   fusion \[=3.36\times {{10}^{5}}J/kg\] Specific latent heat of vapourisation \[=22.68\times {{10}^{5}}J/kg\] \[=X\times {{10}^{-3}}\times 22.68\times {{10}^{5}}\] \[=Y\times {{10}^{-3}}\times 3.36\times {{10}^{5}}+Y\times {{10}^{-3}}\times 4200\times 100\] \[\therefore \] \[\frac{X}{Y}=\frac{7.56}{22.68}=\frac{1}{3}\]


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