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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2015

  • question_answer
    Steam at\[100{}^\circ C\]is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02 kg at\[15{}^\circ C,\]till the temperature of the calorimeter and its contents rises to\[80{}^\circ C\]. The mass of steam condensed (in kg) is

    A) 0.195                                    

    B) 0.065     

    C) 0.130                    

    D) 0.260

    Correct Answer: C

    Solution :

    Heat lost by the steam = Heat gained by water + calorimeter. \[{{p}_{total}}={{\chi }_{A}}{{p}_{\overset{o}{\mathop{A}}\,}}+{{\chi }_{B}}{{p}_{\overset{o}{\mathop{B}}\,}}\] \[=0.\text{45}\times \text{l}00+0.\text{55}\times \text{5}0\] \[=\text{45}+\text{27}.\text{5}\]


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