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Haryana PMT Haryana PMT Solved Paper-2006

  • question_answer
    In an energy recycling process, X g of steam at 100°C becomes water at 100°C which converts Y g of ice at 0°C into water at 100°C. The ratio of X     and Y will be:

    A)                  \[\frac{1}{3}\]                                  

    B)  \[\frac{1}{3}\]

    C)                   3                                           

    D)  2

    Correct Answer: A

    Solution :

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


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