865.    ---------------.  [FALCKE, V.]  [Reaction Between Ferrous Oxide and Carbon and Between Carbon Monoxide and Iron.  IV.]  Ztschr. Elektrochem., vol. 27, 1921, pp. 268-278; Chem. Abs., vol. 15, 1921, p. 3017.

      Previous investigations on the equilibrium of the reactions between FeO and C and between CO and Fe are discussed briefly.  It has been found experimentally that at temperatures under 700 the equilibrium constant,

p2CO

ζ=  ------------------

pCO2RT760

  of the reaction C+CO2=2CO, does not coincide with that obtained from measurements of the equilibrium of the reaction between FeO and C and between CO and Fe.  From both this and analytical data it would appear that in this equilibrium the C does not play a role as a definite phase.  The most probable explanation of this phenomenon is the previously accepted surmise that the equilibrium is determined by the formation of carbide.