Answer: The equilibrium constant for the given reaction is 0.8
Step-by-step explanation:
Equilibrium constant is defined as the ratio of concentration of the products raised to the power its stoichiometric coefficients to the concentration of reactants raised to power its stoichiometric coefficient. It is represented as

For the general equation:

The equilibrium constant is represented as:
![K_c=([C]^c[D]^d)/([A]^a[B]^b)](https://img.qammunity.org/2017/formulas/chemistry/high-school/uzb4zkzfljpnb6vrze361ifbfxemk5wh65.png)
For the given chemical equation:

for this equation is given by:
![K_c=([H_2O][CO])/([H_2][CO_2])](https://img.qammunity.org/2017/formulas/chemistry/high-school/4q9fjtd19f6qz5u96p0mcig3zusi0ibtic.png)
Concentration at equilibrium of

Putting values in above equation, we get:

Hence, the equilibrium constant for the given chemical reaction is 0.8