Volume 22, Issue 3, May 1993
Index of content:
Estimation of the Heat Capacities of Organic Liquids as a Function of Temperature using Group Additivity. I. Hydrocarbon Compounds22(1993); http://dx.doi.org/10.1063/1.555923View Description Hide Description
A second‐order group additivity method has been developed for the estimation of the heat capacity of liquid hydrocarbons as a function of temperature in the range from the melting temperature to the normal boiling temperature. The temperature dependence of group contributions and structural corrections has been represented by a polynomial expression. The adjustable parameters in the polynomials have been calculated using a weighted least squares minimization procedure. Recommended heat capacities from a large compilation of critically evaluated data that contains over 1300 organic liquids served as a database both for the development and testing of the method.
Estimation of the Heat Capacities of Organic Liquids as a Function of Temperature using Group Additivity. II. Compounds of Carbon, Hydrogen, Halogens, Nitrogen, Oxygen, and Sulfur22(1993); http://dx.doi.org/10.1063/1.555924View Description Hide Description
A second‐order group additivity method has been developed for the estimation of the heat capacity of liquidorganic compounds containing carbon, hydrogen, halogens, nitrogen, oxygen, and sulfur. The method permits the estimation of the heat capacity as a function of temperature in the range from the melting temperature to the normal boiling temperature. Group contributions and structural corrections have been made temperature dependent by the use of a polynomial expression. The adjustable parameters in the polynomials have been calculated using a weighted least squares minimization procedure. This work has drawn information for both the development and testing of the method from a large compilation of critically evaluated heat capacity data for over 1300 organic liquids.
Thermodynamic and Thermophysical Properties of Organic Nitrogen Compounds. Part II. 1‐ and 2‐Butanamine, 2‐Methyl‐1‐Propanamine, 2‐Methyl‐2‐Propanamine, Pyrrole, 1‐,2‐, and 3‐Methylpyrrole, Pyridine, 2‐,3‐, and 4‐Methylpyridine, Pyrrolidine, Piperidine, Indole, Quinoline, Isoquinoline, Acridine, Carbazole, Phenanthridine, 1‐ and 2‐Naphthalenamine, and 9‐Methylcarbazole22(1993); http://dx.doi.org/10.1063/1.555925View Description Hide Description
The thermodynamic and thermophysical properties of 1‐ and 2‐butanamine, 2‐methyl‐1‐propanamine, 2‐methyl‐2‐propanamine, pyrrole, 1‐, 2‐ and 3‐methylpyrrole, pyridine, 2‐, 3‐, and 4‐methylpyridine, pyrrolidine, piperiodine, indole, quinoline, isoquinoline, acridine, carbazole, phenanthridine, 1‐ and 2‐naphthalenamine, and 9‐methylcarbazole have been evaluated. Recommended values are given for the following properties: normal boiling, freezing and triple point temperatures, critical constants, thermodynamic properties in the solid and liquid phases, vapor pressure,enthalpy of vaporization, density, second virial coefficients, and enthalpy of combustion. Ideal gas thermodynamic properties have been calculated by statistical mechanical methods.
International Equations for the Saturation Properties of Ordinary Water Substance. Revised According to the International Temperature Scale of 1990. Addendum to J. Phys. Chem. Ref. Data 16, 893 (1987)22(1993); http://dx.doi.org/10.1063/1.555926View Description Hide Description
Consistent with the latest experimental data and the internationally recommended values for the critical parameters we published in 1987, compact and accurate correlation equations are given for the following properties on the saturation line of ordinary (light) water substance: vapor pressure, density, and enthalpy and entropy of both the saturated liquid and the saturated vapor. As an addendum to a paper by A. Saul and W. Wagner, J. Phys. Chem. Ref. Data 16, 893 (1987), this paper brings all temperature values and adjusted coefficients in all correlation equations into agreement with the International Temperature Scale of 1990 (ITS‐90). The new equations form the basis of the ‘‘Revised Supplementary Release on SaturationProperties of Ordinary Water Substance’’ issued by the International Association for the Properties of Water and Steam (IAPWS). This revised release which contains all equations and coefficients adjusted with regard to the ITS‐90 is the main part of this paper.