The equilibrium constant, Kp , for the reaction
CO(g) + H2O(g) -> CO2(g) + H2(g)
at 986°C is 0.63. A rigid cylinder at that temperature contains 1.2 atm of carbon monoxide, 0.20 atm of water vapor, 0.30 atm of carbon dioxide, and 0.27 atm of hydrogen. Is the system at equilibrium?