摘要:

A critical evaluation of the mean activity and osmotic coefficients in aqueous solutions of eleven bi‐univalent compounds of zinc and cadmium and ethylene bis(trimethylammonium) chloride and iodide at 298.15 K is presented. Osmotic coefficients were calculated from direct vapor pressure measurements, from isopiestic measurements and from freezing point depression measurements. Activity coefficients were calculated from electromotive force measurements on galvanic cells with and without transference. Given are empirical coefficients for three different correlating equations, obtained by a weighted least squares fit of the experimental data, and tables consisting of the activity coefficients of the compounds, the osmotic coefficients and activity of water, and the excess Gibbs energy of the solution as functions of the molality for each electrolyte system. The literature coverage is through the computerized version of Chemical Abstracts of September 1979.

ISSN:0047-2689    

DOI:10.1063/1.555639

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

Tabulated values of the dynamic and kinematic viscosity of potassium chloride solutions are given. The tables cover the temperature range 25–150 °C, the pressure range 0.1–35 MPa and the concentration range 0–5 molal. It is estimated that the accuracy of the tabulated values is ±1%. The correlations from which the tables were generated are also given.

ISSN:0047-2689    

DOI:10.1063/1.555640

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

Tabulated values of the dynamic and kinematic viscosity of aqueous sodium chloride solutions are given. The tables cover the temperature range 20–150 °C, the pressure range 0.1–35 MPa and is the concentration range 0–6 molal. It is estimated that the accuracy of the tabulated values is ±0.5%. The correlating equations from which the tables were generated are given.

ISSN:0047-2689    

DOI:10.1063/1.555641

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

The heat capacity of selenium from 0 K to 1000 K is reviewed using measurements on 20 samples reported in the literature. A set of recommended data for trigonal, monoclinic, glassy, and molten selenium is derived. Ring‐chain equilibrium parameters are critically evaluated. Entropy, enthalpy, and Gibbs energy functions are calculated. Selenium is a model compound for a monoatomic, linear macromolecule. This paper is first in a series which will ultimately cover all heat capacity measurements on linear macromolecules.

ISSN:0047-2689    

DOI:10.1063/1.555642

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

The heat capacity of polyethylene from 0 K to 600 K is reviewed using measurements on 46 samples reported in the literature. The crystallinity dependence is evaluated critically and a set of recommended data for completely crystalline and amorphous polyethylene is derived. Entropy, enthalpy, and Gibbs energy functions are calculated. Polyethylene can serve as a standard material for the thermodynamic functions of a simple linear macromolecule. This paper is the second in a series which will ultimately cover all heat capacity measurements on linear macromolecules.

ISSN:0047-2689    

DOI:10.1063/1.555636

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

Energy level data are given for the atom and all positive ions of sodium (Z= 11). These data have been critically compiled, mainly from published material on measurements and analyses of the optical spectra. We have derived or recalculated the levels for a number of the ions. In addition to the level value in cm−1and the parity, theJvalue and the configuration and term assignments are listed if known. Leading percentages from the calculated eigenvectors are tabulated wherever available. Ionization energies are given for all spectra.

ISSN:0047-2689    

DOI:10.1063/1.555637

出版商:AIP    

年代:1981

数据来源: AIP

摘要:

The energy levels of the nickel atom in all of its stages of ionization, as derived from the analyses of atomic spectra, have been critically compiled. In cases where only line classifications are reported in the literature, level values have been derived. Electron configurations, term designations,J‐values, experimentalg‐values, and ionization energies are included.

ISSN:0047-2689    

DOI:10.1063/1.555638

出版商:AIP    

年代:1981

数据来源: AIP