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BVP Medical BVP Medical Solved Paper-2003

  • question_answer
    For  \[CaC{{O}_{3}}(s)CaO(s)+C{{O}_{2}}(g)\]at \[{{927}^{o}}C,\] \[\Delta H=176kJ\] mol: then  is:

    A)  \[180\text{ }kJ\]             

    B)  \[186.4\text{ }kJ\]

    C)  \[166.0kJ\]                        

    D)  \[160\text{ }kJ\]

    Correct Answer: C

    Solution :

                      \[CaC{{O}_{3}}(g)CaO(s)+C{{O}_{2(g)}}\] \[(\Delta {{n}_{g}}=1-0=1)\] We know that,                 \[\Delta H=\Delta E+\Delta {{n}_{g}}RT\] \[176=\Delta E+1\times 8.31\times {{10}^{-3}}\times (273+927)\] \[\therefore \] \[\Delta E=176-8.31\times {{10}^{-3}}\times 1200\]                 \[=176-9.97\]                 \[=166.03kJ\]


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