2. Solved Papers
  3. BVP Medical

BVP Medical BVP Medical Solved Paper-2008

  • question_answer
    The heat of combustion of solid benzoic acid at constant volume is \[-321.30kJ\] at \[{{27}^{o}}C\]. The heat of combustion at constant pressure is

    A)  \[-321.30-300R\]

    B)  \[-321.30+300R\]

    C)  \[-321.30-150R\]

    D)  \[-321.30-900R\]

    Correct Answer: C

    Solution :

                     \[{{C}_{6}}{{H}_{5}}COOH(s)+\frac{15}{2}{{O}_{2}}(g)\xrightarrow{{}}\] \[7C{{O}_{2}}(g)+3{{H}_{2}}O(l)\]                 \[\Delta {{n}_{g}}={{n}_{p}}-{{n}_{r}}=7-\frac{15}{2}=\frac{-1}{2}\]                 \[{{q}_{p}}={{q}_{v}}+\Delta {{n}_{g}}(RT)\]                 \[=-321.30+\left( -\frac{1}{2} \right)300R\]                 \[=-321.30-150R\]


You need to login to perform this action.
You will be redirected in 3 sec spinner