Answer: The equilibrium constant expression for the given system is
![K_(eq)=([CO_2])/([O_2])](https://img.qammunity.org/2021/formulas/chemistry/middle-school/lxhc8ht1pby9eddxcp56piv8o2qs3i16nv.png)
Step-by-step explanation:
Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric coefficients. It is represented by

For a general chemical reaction:

The
is written as:
![K_(eq)=([C]^c[D]^d)/([A]^a[B]^b)](https://img.qammunity.org/2021/formulas/chemistry/college/jbd7uq80565lgtnpqjte86knmd4rxyi07m.png)
The concentration of pure solid and pure liquid are taken as 1 in equilibrium expression.
The
for the given reaction is written as:
![K_(eq)=([CO_2])/([O_2])](https://img.qammunity.org/2021/formulas/chemistry/middle-school/lxhc8ht1pby9eddxcp56piv8o2qs3i16nv.png)