J & K CET Medical J & K - CET Medical Solved Paper-2012

  • question_answer
    Enthalpy of combustion of carbon to\[C{{O}_{2}}\]is\[-393.52\text{ }kJ/mol\]. The heat released upon formation of 11 g of\[C{{O}_{2}}\]from carbon and dioxygen is

    A)  35.77 kJ

    B)  98.38 kJ

    C)  1574.08 kJ

    D)  393.52 kJ

    Correct Answer: B

    Solution :

     The heat released upon formation of\[C{{O}_{2}}\] will be\[+393.52kJ/mol\] 1 mol\[C{{O}_{2}}=44\text{ }g\text{ }of\,C{{O}_{2}}\] So, for 44 gm of\[C{{O}_{2}}\]formation energy released is\[+393.52\text{ }kJ\] \[\therefore \] for 11 g of\[C{{O}_{2}}\]formation energy released \[=\frac{393.52}{44}\times 11\] \[=98.38kJ\]


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