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 1310.    HAHN, O.  [Contribution to the Thermodynamics of Water Gas.]  Ztschr. Physik. Chem., vol. 44, 1903, pp. 513-547; Chem. Zentralb., 1903, 2, p. 540; Jour. Soc. Chem. Ind. (London), vol. 22, 1903, p. 1038.

        From the results of experiments at a constant temperature with mixtures containing varying proportions of CO₂ and H₂ the author finds that the law of mass action can be applied for the reaction:

CO₂+H₂=CO+H₂O.

                                                                CO.H₂O 

The value of equilibrium-constant K =  CO.H₂O    is 0·534 at 686° C., 0·840 at 786°,

                                                               CO₂.H₂

1·197 at 886°, 1·571 at 986°, 1·62 at 1,005°, 1·96 at 1,086°, 2·12 at 1,205°, and 2·49 at 1,405°.   Up to 1,100° C, the constant may be expressed by the formula:  log

K =- 2232 - 0·08463 log T - 0·0002203 T + 2·5084.

           T