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11th Class Physics Thermodynamical Processes Question Bank Critical Thinking

  • question_answer
    When \[50c{{m}^{3}}\] of \[0.2\,N\,{{H}_{2}}S{{O}_{4}}\] is mixed with \[50c{{m}^{3}}\] of \[1\,N\,KOH\], the  heat liberated is          [KCET 2004]

    A)                 11.46 kJ

    B)                 57.3 kJ

    C)                 573 kJ   

    D)                 573 J

    Correct Answer: D

    Solution :

               For complete neutralization of strong acid and strong base energy released is \[57.32\,KJ/mol\]                    No. of mole of \[{{H}_{2}}S{{O}_{4}}=\frac{0.2\times 50}{1000}={{10}^{-2}}\]                    No. of mole of \[KOH=\frac{1}{1000}\times 50=5\times {{10}^{-2}}\]                                 So \[=57.32\times {{10}^{-2}}=0.5732\,KJ\] \[=573.2\,\,Joule\].


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