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CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2003

  • question_answer
    For the reaction\[{{H}_{2}}(g)+{{I}_{2}}(g)2HI(g),\]the equilibrium constants expressed in terms of concentrations\[{{K}_{c}}\]and in terms of partial pressures\[{{K}_{p}},\]are related as:

    A)  \[{{K}_{p}}={{K}_{c}}{{(RT)}^{2}}\]

    B)  \[{{K}_{p}}={{K}_{c}}{{(RT)}^{-2}}\]

    C)  \[{{K}_{p}}={{K}_{c}}\]

    D)  \[{{K}_{c}}={{K}_{p}}(RT)\]

    E)  \[{{K}_{c}}={{K}_{p}}{{(RT)}^{-1}}\]

    Correct Answer: C

    Solution :

    For the reaction \[{{H}_{2}}(g)+{{I}_{2}}(g)2HI(g)\] \[{{K}_{p}}={{K}_{c}}{{(RT)}^{\Delta n}}\] \[\Delta n=2-2=0\] So,          \[{{K}_{p}}={{K}_{c}}\]   (where,\[{{K}_{p}}\]and\[{{K}_{c}}\]are equilibrium constants in   terms   of   partial   pressures   and concentrations.)


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