3147.     SCHWARTZ, C., AND ULICH, H.  [Specific Heat, Entropy, and Energy of Formation of the Iron Carbide Fe3C.]  Arch. Eisenhüttenw., vol. 10, 1936, pp. 11-12; Chem. Abs., vol. 30, 1936, p. 7021.

        Specific heat of Fe₃C can be expressed by 2 equations, 1 below and 1 above the magnetic transformation point; for the range 273.2°-407.1° K.  C=16.8-0.028 T cal. per mol., and from 407.1° K. upward C=28.2.  The energy of formation is represented by 3 Fe_a+C_β-graphite→Fe₃C; energy=2,600 cal. per mol.  Heat content I and entropy S for temperatures above 407.1° K. (134°) and for 298.2° K. (25°) as base are expressed by 298.2 I^T=28.2 T-8575.4; 298.2 I^407.1=2906 cal. per mol., ₀S^T=28.2 In T-137.8; ₀S^407.1=32.176 cal. per degree per mol.  5 refs.

        SCHWARZ VON BERGKAMPFE, E.  See abs. 340.