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JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Critical Thinking

  • question_answer
    The molar heat capacity of water at constant pressure is 75 \[J{{K}^{-1}}\,\,mo{{l}^{-1}}\]. When 1.0 kJ of heat is supplied to 100 g of water which is free to expand, the increases in temperature of water is                                    [CBSE PMT 2003]

    A)                 6.6 K      

    B)                 1.2 K

    C)                 2.4 K      

    D)                 4.8 K

    Correct Answer: C

    Solution :

               Heat capacity of water per gram\[=\frac{75}{18}=4.17\]                    Q = mST                    \[1000=100\times 4.17\times t\]                                 \[t=\frac{1000}{100\times 4.17}=2.4\,K\].


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