The thermodynamic tabulations previously published in four collections are extended by 227 new and revised tables. The JANAF Thermochemical Tables cover the thermodynamic properties over a wide temperature range with single phase tables for the crystal, liquid, and ideal gas state. In addition some multiphase tables are given. The properties given are heat capacity, entropy, Gibbs energy function, enthalpy, enthalpy of formation, Gibbs energy of formation, and the logarithm of the equilibrium constant for formation of each compound from the elements in their standard reference states. Each tabulation lists all pertinent input data and contains a critical evaluation of the literature upon which these values are based. Literature references are given.

The thermodynamic tabulations previously published in NSRDS-NBS-37 and the 1974 supplement (J. Phys. Chem. Ref. Data 3, 311 [1974]) are extended by 158 new and revised tables. The JANAF Thermochemical Tables cover the thermodynamic properties over a wide temperature range with single phase tables for the crystal, liquid, and ideal gas state. The properties given are heat capacity, entropy, Gibbs energy function, enthalpy, enthalpy of formation, Gibbs energy of formation, and the logarithm of the equilibrium constant for formation of each compound from the elements in their standard reference states. Each tabulation lists all pertinent input data and contains a critical evaluation of the literature upon which these values are based. Literature references are given.

Structures of Carbides, Nitrides and Oxides of Uranium 99 passed through the reactor at 235°. The effluent gaseous products of the reaction were found to be as follows Propylene Per cent.

The thermodynamic tabulations previously published in NSRDS–NBS 37, the 1974 Supplement (J. Phys. Chem. Ref. Data 3, 311 (1974), and the 1975 Supplement (J. Phys. Chem. Ref. Data 4, 1 (1975) are extended by 131 new and revised tables. The JANAF Thermochemical Tables cover the thermodynamic properties over a wide temperature range with single phase tables for the crystal, liquid, and ideal gas state. The properties given are heat capacity, entropy, Gibbs energy function, enthalpy, enthalpy of formation, Gibbls energy of formation, and the logarithm of the equilibrium constant for formation of each compound from the elements in their standard reference states. Each tabulation lists all pertinent input data and contains a critical evaluation of the literature upon which these values are based. Literature references are given.

The vapor pressures of 30 purified samples of organic compounds have been determined by a dynamic boiling point method (3). For 29 compounds, the constants in the Antoine vapor pressure equation were determined from experimental data by a least squares method using an automatic computer.For pentachlorophenol, the constants were determined from a plot of log p, 1 / T (T in °K.). Eight solid state vapor pressures, a heat of fusion of 7000 cal. per mole, and the selected vapor pressures (2) were considered in determining the "best straight line" through three liquid state vapor pressures. The Knudsen effusion technique (I) was used by G. C. Sinke of these laboratories to determine the solid state vapor pressures.The standard deviation, , of the temperature differences is included in Table I.The samples were analyzed by freezing curve techniques (3) except as noted in Table II), and all were better than 99.5 mole % pure, assuming ideal behavior. The freezing point and purity data and the Antoine constants are listed in Table II. Temperatures calculated at selected pressures are in Table III.