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JEE Main & Advanced Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank Heat of reaction

  • question_answer
    When \[50\,c{{m}^{3}}\] of a strong acid is added to \[50\,c{{m}^{3}}\] of an alkali, the temperature rises by \[{{5}^{o}}C\]. If  \[250\,c{{m}^{3}}\] of each liquid are mixed, the temperature rise would be [KCET 1999]

    A)                 \[{{5}^{o}}C\]   

    B)                 \[{{10}^{o}}C\]

    C)                 \[{{25}^{o}}C\] 

    D)                 \[{{20}^{o}}C\]

    Correct Answer: A

    Solution :

              No doubt heat evolved during neutralisation of \[250\,c{{m}^{3}}\]of each acid and base is five time the heat evolved during neutralisation of \[50\,c{{m}^{3}}\]of each acid and base but the quantity if solution taking heat is also five time thus same temperature rise is noticed.


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