3207.     ---------------.  [SMITH, D. F.]  Note Concerning Thermodynamic Calculations.  Ind. Eng. Chem., vol. 20, 1928, pp. 859-860; Chem. Abs., vol. 22, 1928, p. 4339.

        Synthesis of hydrocarbons especially C₆H₆, from water gas is considered.  The rate of reaction is stressed s an important factor, for free-energy values alone will not tell what species predominates.  Comments are made on Francis’ calculations of the free energies of various hydrocarbons and alcohols (abs. 1079), and it is pointed out that the use of thermal data often leads to erroneous results.  Values from equilibrium constants, where all substances involved are at the standard fugacity of 1 atm., are more reliable.