The thermodynamic properties of CoO, Co3O4, and the liquid phase were assessed, and an optimized set of parameters of Gibbs energy functions is proposed. The two stable solid oxides, CoO and Co3O4, were both treated as stoichimetric compounds. The paramagneticantiferromagnetic transition of CoO is well represented by a magnetic ordering model. The Co3O4 spinel phase was described as a normal spinel at room temperature and with cation redistribution at high temperatures. A high-temperature anomaly of Co3O4 was interpreted as a normal-inverse spinel transition. An ionic two-sublattice model was used to model the liquid phase. A calculated phase diagram is presented, and values for the thermodynamic properties are compared with experimental data.

Thermodynamic Assessment of the Co-O System

The Fe-O (Iron-Oxygen) System

A large number of experimental equilibrium constants for the reactions involved in methanol synthesis were collected or calculated from several literature sources. Equilibrium relationships were derived from basic thermochemical data and subsequently fitted to the experimental results by adapting only the Gibbs energy of formation values for CH3OH and CO. Very small changes of these parameters as compared to the original literature values were sufficient to obtain accurate relationships that adequately describe the experimental results.

Chemical Equilibria in Methanol Synthesis Including the Water–Gas Shift Reaction: A Critical Reassessment

In order to evaluate factors that affect the extent of organic anion binding to charged micellar interfaces, the ion exchange constants of four substituted aromatic anions, o-, m-, and p-nitrobenzo...

Determination of the ion exchange constants of four aromatic organic anions competing for a cationic micellar interface

As a first step in a study of the physical chemistry of copper-smelting slags, experimental measurements were made of the oxygen pressure of simple iron-silicate slags in equilibrium with solid iron. The experiments consisted in bubbling CO2-CO mixtures through the slags in iron crucibles and in finding the equilibrium ratios of CO2, to CO. From the data, activ-ities and partial molal heats of solution FeO and SiO2 in the slags were calculated.

Thermodynamics of Iron-Silicate Slags: Slags Saturated with Gamma Iron

EQUILIBRIA IN THE Fe-H-O SYSTEM. INDIRECT CALCULATION OF THE WATER GAS EQUILIBRIUM CONSTANT

EQUILIBRIUM IN THE SYSTEM Co-CO2-CoO-CO. INDIRECT CALCULATION OF THE WATER GAS EQUILIBRIUM CONSTANT

INFLUENCE OF GASEOUS THERMAL DIFFUSION ON EQUILIBRIUM MEASUREMENTS ON THE Fe—O—H SYSTEM

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EQUILIBRIA IN THE Fe-H-O SYSTEM. INDIRECT CALCULATION OF THE WATER GAS EQUILIBRIUM CONSTANT

EQUILIBRIUM IN THE SYSTEM Co-CO2-CoO-CO. INDIRECT CALCULATION OF THE WATER GAS EQUILIBRIUM CONSTANT

INFLUENCE OF GASEOUS THERMAL DIFFUSION ON EQUILIBRIUM MEASUREMENTS ON THE Fe—O—H SYSTEM