BVP Medical BVP Medical Solved Paper-2014

  • question_answer
    An ideal gas expands in volume from \[{{10}^{-2}}\,M\,C{{a}^{2+}}+{{10}^{-3}}M{{F}^{-}}\] to \[2{{H}^{+}}+2{{e}^{-}}+\frac{1}{2}{{O}_{2}}\xrightarrow{{}}{{H}_{2}}O(l);{{E}^{o}}=+1.23V\]at 300 K against a constant pressure of \[F{{e}^{2+}}+2{{e}^{-}}\xrightarrow{{}}Fe(s);\,\,{{E}^{o}}=-0.44V\]. The work done is

    A)  \[\Delta G\]                      

    B)  \[-322\text{ }kJ\text{ }mo{{l}^{-1}}\]

    C)  \[-161\text{ }kJ\text{ }mo{{l}^{-1}}\]                    

    D)  \[-152\,kJ\,\,mo{{l}^{-1}}\]

    Correct Answer: D

    Solution :

                     Work done by gas \[=-{{p}_{ext}}\times \] change in volume \[=-{{10}^{5}}({{10}^{-2}}-{{10}^{-3}})\] \[=-{{10}^{5}}\times 0.009\] \[=-900J\]


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