2813.     RHEAD, T. F. E., AND WHEELER, R. V.  Effect of Temperature on the Equilibrium 2 CO=CO2+C.  Proc. Chem. Soc., vol. 26, 1910, p. 220; Jour. Chem. Soc., vol. 97, 1910, pp. 2178-2189; Chem. Abs., vol. 5, 1911, p. 641.

        In an electric furnace constructed so that a given temperature could be maintained, without serious fluctuations, for several weeks, and with a N₂ jacket around the reaction tube to prevent diffusion of O₂, pure CO₂ was circulated over pure wood charcoal until the pressure became constant.  The values obtained for the equilibrium are as follows:  At 850°, by vol., 6.23% CO₂ and 93.77% CO; 900°, 2.22, 97.78; 950°, 1.32, 98.68; 1,000°, 0.59, 99.41; 1,050°, 0.37, 99.63; 1,100°, 0.15, 99.85; 1,200°, 0.06, 99.94.  By means of the equation (19,500/T)+log_e C₁² log_eC₂=k (from LeChatelier’s equation for the equilibrium in gaseous systems), the following values for k, at the above series of temperatures were calculated:  20.01, 20.39, 20.24, 20.44, 20.32, 20.70, and 20.65.  At 850°, the speed of reduction of CO₂ by C was found to be 116 times that of the reverse reaction.  (See abs. 185, 319, 698, and 3068).