If the standard electrode potential for a cell is 2 V at 300 K, the equilibrium constant (K) for the reaction 

Zn(s)+Cu^{2+}(aq)\rightleftharpoons Zn^{2+}(aq)+Cu(s)   at 300 K is approximately (R=8 JK^{-1}mol^{-1},F=96000\: C\: mol^{-1})

  • Option 1)

    e^{320}

  • Option 2)

    e^{-80}

     

  • Option 3)

    e^{-160}

  • Option 4)

    e^{160}

     

Answers (1)
A admin

 

Equilibrium constant for a net reaction -

K_{net}=K_{1}\times K_{2}.........

- wherein

The equilibrium constant for a net reaction obtained after adding two reactions equal the product of the equilibrium constant for individual reactions.

 

 

Equilibrium constant in gaseous system -

For equilibrium involving gases, it is usually more convenient to express the equilibrium constant in terms of partial pressure. 

- wherein

The ideal gas equation is written as 

PV=nRT

 

 

Equilibrium in Chemical processes -

When the rates of forward and reverse reactions become equal the concentration of the reactants and the products remains constant. This is the stage of chemical equilibrium. 

-

\Delta G^{0}= -RT ln K=-nFE_{Cell}^{0}

lnk = \frac{nFE^{0}}{RT}=\frac{2\times 96000\times 2}{8\times 300}

lnk = 160

k = e^{160}

 


Option 1)

e^{320}

Option 2)

e^{-80}

 

Option 3)

e^{-160}

Option 4)

e^{160}

 

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