2574.     PARKS, G. S., AND HOFFMAN, H. M.  Free Energies of Some Organic Compounds.  Chemical Catalog Co., New York, 1932, p. 113-123.

        3 methods for developing the free-energy equation for the reaction CO+2H₂=CH₃OH (g) are reviewed:  (1) The application of the 3d law of thermodynamics to the available thermal data; (2) direct measurement of the equilibrium constant at 1 or more temperatures; (3) calculation based on measurements of equilibria in the methyl formate reactions.  The 1^st method is considered the most accurate, and the equation adopted is:  ΔF°₂₉₈=-17,660+17.5T In T –0.01367T²-57.2T.