Value of kc=4.24 at 800k for the reaction.. Co(g) +h2o(g) - - - co2(g) +h2(g).
Let x mol of CO react so by stoichiometry x mol of H2O react, and x mol of CO2 and H2 formed
So at Equilibrium, We have the following
CO2 __________________________ x mol/l
H2 __________________________ x mol/l
CO ___________________________ 0.1-x mol/l
H2O ___________________________ 1-x mol/l
Therefore
k=[CO2][H2]/[CO][H2O]
4.24=x^2/(1-x)^2
x=0.067 mol/l