Volume 6, Issue 2, April 1977
Index of content:
6(1977); http://dx.doi.org/10.1063/1.555550View Description Hide Description
The energy levels of the chromium atom in all of its stages of ionization, as derived from the analyses of atomic spectra, have been completed. In cases where only line classifications are given in the literature, level values have been derived. The percentages for the two leading components of the calculated eigenvectors of the levels are given where available. Ionization energies and g‐factors are also given.
6(1977); http://dx.doi.org/10.1063/1.555551View Description Hide Description
A critical evaluation of the mean activity, γ., and osmotic coefficients, γ±, and osmotic coefficients, ∮, of aqueous calcium chloride at 298.15 K is presented for the concentration range of 0 to 10 mol⋅kg−1. Osmotic coefficients were calculated from direct vapor pressuremeasurements, from isopiestic measurements or from freezing point depression measurements. Activity coefficients were calculated from electro‐motive force measurements of galvanic cells, both without liquid‐junction and with transference, and from diffusion data. A non‐linear least‐squares program was used to fit data from all sources using both ∮ and in γ± as a function of molality. An eight‐parameter extended Debye‐Huckel equation describes the osmotic coefficient, the mean activity coefficient, and the excess free energy as a function of molality. The scientific literature has been covered through July 1976.
Molten Salts: Volume 4, Part 3, Bromides and Mixtures; Iodides and mixtures—Electrical conductance, density, viscosity, and surface tension data6(1977); http://dx.doi.org/10.1063/1.555552View Description Hide Description
Data on the electrical conductance, density, viscosity, and surface tension of bromide mixtures and iodide mixtures have been systematically collected and evaluated. Results are given for eighty‐five binary mixtures over a range of compositions and temperatures. Values of the above properties for twenty‐three single bromide and iodide salts are also given.
6(1977); http://dx.doi.org/10.1063/1.555553View Description Hide Description
Data for the viscosity and thermal conductivity coefficients of dense gaseous and liquid methane have been evaluated. Selected data were fitted to a function derived in our previous work and tables of values were generated for temperatures from 95 to 500 K and for pressures up to 50 MPa (∠500 atm). The uncertainties of the tabular values are estimated to be approximately 3% and 5% for the viscosity and thermal conductivity coefficients, respectively. The contribution for the thermal conductivity enhancement in the critical region is included in the tables. Care has been taken to ensure that the calculated values are consistent with reliable equation‐of‐state data and also with dilute gas transport coefficients determined previously.
6(1977); http://dx.doi.org/10.1063/1.555554View Description Hide Description