JEE Main & Advanced Physics Thermometry, Calorimetry & Thermal Expansion Question Bank Calorimetry

  • question_answer
    5 g of ice at 0°C is dropped in a beaker containing 20 g of water at 40°C. The final temperature will be      [Pb. PET 2003]

    A)            32°C                                         

    B)            16°C

    C)            8°C

    D)            24°C

    Correct Answer: B

    Solution :

               For water and ice mixing \[{{\theta }_{\text{mix}}}=\frac{{{m}_{W}}{{\theta }_{W}}-\frac{{{m}_{\,i}}{{L}_{\,i}}}{{{c}_{W}}}}{{{m}_{\,i}}+{{m}_{W}}}\] \[=\frac{20\times 40-\frac{5\times 80}{1}}{5+20}=16{}^\circ C\]


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