What effect will increasing the temperature have on the system? Fe3O4(s) + CO(g) ?? 3 FeO(s) + CO2(g) DH°= +35.9 kJ A) No effect will be observed. B) The reaction will shift to the right in the direction of products. C) The equilibrium constant will increase. D) The reaction will shift to the left in the direction of reactants. E) The equilibrium constant will decrease.