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

  • question_answer
    How much heat energy is gained when 5 kg of water at 20°C is brought to its boiling point (Specific heat of water = 4.2 kJ kg?1c?1)                  [BHU 2001]

    A)            1680 kJ                                    

    B)            1700 kJ

    C)            1720 kJ                                    

    D)            1740 kJ

    Correct Answer: A

    Solution :

                       \[Q=m.c.\Delta \theta =5\times (1000\times 4.2)\times (100-20)\]                \[=1680\times {{10}^{3}}J=1680\,kJ\]


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