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

  • question_answer
    0.93 watt-hour of energy is supplied to a block of ice weighing 10 gm. It is found that [NCERT 1973; DPMT 1999]

    A)            Half of the block melts

    B)            The entire block melts and the water attains a temperature of 4°C

    C)            The entire block just melts

    D)            The block remains unchanged

    Correct Answer: C

    Solution :

                       Energy supplied \[=0.93\times 3600\,joules\]= 3348 joules                    Heat required to melt 10 gms of ice                    \[=10\times 80\times 4.18=3344\,joules\]            Hence block of ice just melts.


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