Accession Number : ADA187509

Title :   Evaluation and Compilation of Thermodynamic Properties of High Temperature Chemical Species.

Descriptive Note : Final rept. 20 May 85-19 May 86,

Corporate Author : DOW CHEMICAL CO MIDLAND MICH THERMAL RESEARCH LAB

Personal Author(s) : Chase, Malcolm W

PDF Url : ADA187509

Report Date : 13 Aug 1987

Pagination or Media Count : 9

Abstract : This work involves a continuing effort to provide a set of critically evaluated, internally consistent, high temperature thermochemical tables; the JANAF Thermochemical Tables. During this contract period, the chemical species studied fell into three categories - alkaline earth species, alkali metal species, alkali metal species, and elements. The species in the alkaline metal series include the metals themselves, hydroxides, halides, oxides, sulfides, sulfates and carbonates. The species in the alkali metal series include the halides and the carbonates. The elements under study include boron and aluminum. The support information gathered for the study of these chemical species has been collected together in a concise readable form and is available upon request. The calculation of the thermodynamic functions for diatomic gases was greatly enhanced by the addition of two calculational techniques. These procedures permit a more accurate accounting of the vibrational-rotational energy levels for each electronic state, including the metastable levels just above the dissociation limit. These procedures are particularly important in those cases where the electronic potential energy curve is very shallow, i.e. diatomic beryllium. Keywords: Enthalpy of formation, Entropy, Gibbs energy function, Gibbs enthalpy of formation, Heat capacity, Thermochemical tables, Enthalpy.

Descriptors :   *ALKALI METALS, *ALKALINE EARTH COMPOUNDS, *ALKALINE EARTH METALS, *TABLES(DATA), *THERMOCHEMISTRY, ALUMINUM, BERYLLIUM, BORON, CARBONATES, DIATOMIC MOLECULES, DISSOCIATION, ELECTRON ENERGY, ELECTRONIC STATES, ENERGY, ENTHALPY, ENTROPY, GASES, GRAPHS, HALIDES, HIGH TEMPERATURE, HYDROXIDES, METALS, METASTABLE STATE, OXIDES, POTENTIAL ENERGY, SPECIFIC HEAT, SULFATES, SULFIDES, THERMODYNAMIC PROPERTIES, THERMODYNAMICS, CHEMICAL REACTIONS, HANDBOOKS, STANDARDIZATION, DIMERS

Subject Categories : Inorganic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE