The Standard Molar Free Energy of Formation of Thorium Carbide by Electromotive Force Measurements1

1964 ◽  
Vol 68 (4) ◽  
pp. 978-979 ◽  
Author(s):  
J. J. Egan
Keyword(s):  
Free Energy ◽  
Electromotive Force ◽  
Molar Free Energy ◽  
Free Energy Of Formation ◽  
Energy Of Formation

The Solubility of Metallic Selenium under Anoxic Conditions

2000 ◽  
Vol 663 ◽  
Author(s):  
Yoshihisa Iida ◽  
Tetsuji Yamaguchi ◽  
Shinichi Nakayama ◽  
Tomoko Nakajima ◽  
Yoshiaki Sakamoto
Keyword(s):  
Free Energy ◽  
Solid Phase ◽  
Equilibrium Constants ◽  
Absorption Spectrometry ◽  
X Ray Diffraction ◽  
Molar Free Energy ◽  
Anoxic Conditions ◽  
X Ray ◽  
Free Energy Of Formation ◽  
Energy Of Formation

ABSTRACTThe solubility of metallic selenium was measured in a mixture of 0.1M-NaCl and 0.05M-N2H4under anoxic conditions (O2 < 1 ppm) by both oversaturation and undersaturation methods. Equilibrium was attained in 40 days. The aqueous selenium species identified were HSe at pH between 5 and 8, and Se42at pH between 10 and 13, by UV-Vis absorption spectrometry. The solid phase was identified as Se (cr) by X-ray diffraction. The equilibrium constants ofSe(cr) + H+ + 2e- = HSe- logK0 = -6.5±0.5 and4Se(cr) + 2e- = Se42- logK0 = -16.8±0.5were determined. The standard molar free energy of formation of HSe- and Se42-was determined to be (37.1±2.9) and (95.9±2.9) kJ/mol, respectively.

Standard Gibbs free energy of formation of ZrOS

1990 ◽  
Vol 163 (1) ◽  
pp. 109-113 ◽  
Author(s):  
Zhi-Tong Sui ◽  
Xing-Yi Xiao ◽  
Ke-Qin Huang ◽  
Chang-Zhen Wang
Keyword(s):  
Free Energy ◽  
Gibbs Free Energy ◽  
Standard Gibbs Free Energy ◽  
Free Energy Of Formation ◽  
Energy Of Formation

Thermodynamical study of (CaGa2S4)x(BaGa2S4)1−x solid solutions

2021 ◽  
pp. 2150469
Author(s):  
T. G. Naghiyev ◽  
R. M. Rzayev
Keyword(s):  
Free Energy ◽  
Solid Solutions ◽  
Calculation Method ◽  
Solid Phase ◽  
Ternary Compounds ◽  
Free Energy Of Formation ◽  
Concentration Dependences ◽  
Solid Phase Reactions ◽  
Two Phases ◽  
Energy Of Formation

The solid solutions of [Formula: see text] were synthesized by solid-phase reactions from powder components of CaS, BaS, and Ga2S3. The temperature-concentration dependences of the Gibbs free energy of formation of [Formula: see text] solid solutions from ternary compounds and phase diagrams of the CaGa2S4–BaGa2S4 were determined by a calculation method. It was revealed that continuous solid solutions are formed in these systems. The spinodal decomposition of [Formula: see text] solid solutions into two phases is predicted at ordinary temperatures.

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