Volume 14, Issue 2, April 1985
Index of content:
14(1985); http://dx.doi.org/10.1063/1.555729View Description Hide Description
The microwave spectrum of sulfur dioxide (SO2) is critically reviewed and supplemented with spectral frequency calculations derived from rotational and centrifugal distortion terms in the molecular Hamiltonian. The primary objective of this review is to provide the microwave transition frequencies applicable to molecular radio astronomy for the ground vibrational state of the most abundant isotopic forms, i.e., the singly substituted atoms 3 3S and 3 4S. Also included is an analysis of the lowest lying vibrationally excited state (ν2=1) of 3 2S1 6O2. The frequency limits and maximum rotational quantum value (J) vary for each isotopic form but for 3 2S1 6O2 the frequency range 100 MHz to 650 GHz is presented for J max=60.
Evaluation of the Thermodynamic Functions for Aqueous Sodium Chloride from Equilibrium and Calorimetric Measurements below 154 °C14(1985); http://dx.doi.org/10.1063/1.555730View Description Hide Description
A new weighted least‐squares method is described which is generally applicable for the nonsubjective evaluation of the best set of thermodynamic functions from a given data set of equilibrium (ΔG) and calorimetric (ΔH, C p ) measurements. The method, applied to model a wide range of 2428 measurements for the water‐sodium chloride system between −21 and 154 °C, accurately represents all measurements within experimental error. The resulting model is used to predict the thermodynamic functions and their standard errors for aqueous sodium chloride up to 110 °C. Tables are given for freezing point, solubility, boiling point, osmotic and activity coefficients, vapor pressure, apparent molal relative enthalpy, partial molal relative enthalpies, integral heat of solution,specific heat, apparent molal heat capacity, partial molal heat capacities, apparent molal relative heat capacity, partial molal relative heat capacities, standard thermodynamic functions, and their changes for dissolution.
14(1985); http://dx.doi.org/10.1063/1.555751View Description Hide Description
In this review, the parameters K and α found in the literature for the Mark–Houwink–Sakurada equation relating viscosity to molecular weight have been critically evaluated for linear polyethylene, and values have been recommended for six commonly used solvents. These are decalin, 1,2,4‐tricholorobenzene, 1‐chloronaphthalene, tetralin, o‐dichlorobenzene, and p‐xylene. In addition, the literature values of K for several different theta solvents are presented.