Proof of Gibbs' Hypothesis on the Tendency toward Statistical Equilibrium.

or non-reacting gas mixtures, thus enabling values of (for such mixtures T to be used to guide the equation of state theory for mixtures. This is of interest, for a complete knowledge of the van der Waals forces in mixtures is of profound importance in the application of thermodynamics to chemical equilibria at finite pressures. I J. W. Gibbs, Scientific Papers, Vol. I, p. 87. 2 J. A. Beattie, Proc. Amer. Acad., 63, 229 (1928); J. Math. and Phys. M.I.T., 9, 11 (1930). 3K. F. Herzfeld Muller Pouillet, Lehrbuch der Physik, 3, 161: also F. G. Keyes, Chem. Rev., 6, 175 (1929). 4 J. G. Kirkwood and F. G. Keyes, Phys. Rev., 38, 516 (1931). 6 J. G. Kirkwood, Phys. Zeit., 33, 39 (1932). 6An innovation in the technique of measuring the Joule-Thomson effect to be reported later has been developed which is adapted to low temperatures and low pressures. From the two effects (T and )T the value of cp is immediately deducible. (Eq. 3.)