3604.     WATANABE, M.  Equilibrium in the Reduction of Cobaltous Oxide by Carbon Monoxide.  Bull. Inst. Phys. Chem. Research (Tokyo), vol. 9, 1930, pp. 676-682 (abs. 62-63, in English); Sci. Papers Inst. Phys. Chem. Research (Tokyo), vol. 14, No. 262-263, 1930; Chem. Abs., vol. 25, 1931, p. 3224.

        Equilibrium CoO(s)+CO=Co(s)+CO₂ was studied by a static method over the range 563°-861°.  The observed values of the equilibrium constant K_p=p_CO2/p_CO range between 174.4 (at 563°) and 23.2 (at 861°) and agree over the entire range (within 1%) with the following formula, which was derived with the aid of specific heat data:  -RT in K_p=∆F°=-11544+8.06 T log T-0.00305 T²+0.00000031 T²-17.65 T.