摘要:

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.

ISSN:0047-2689    

DOI:10.1063/1.555923

出版商:AIP    

年代:1993

数据来源: AIP

摘要:

A second‐order group additivity method has been developed for the estimation of the heat capacity of liquid organic 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.

ISSN:0047-2689    

DOI:10.1063/1.555924

出版商:AIP    

年代:1993

数据来源: AIP

摘要:

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.

ISSN:0047-2689    

DOI:10.1063/1.555925

出版商:AIP    

年代:1993

数据来源: AIP

摘要:

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 Saturation Properties 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.

ISSN:0047-2689    

DOI:10.1063/1.555926

出版商:AIP    

年代:1993

数据来源: AIP