Vaporization Thermodynamics of GeO2 by High-Temperature Mass Spectrometry

被引：0
|
作者：
Smirnov, A. S. [1 ]
Smorchkov, K. G. [1 ]
Gribchenkova, N. A. [1 ]
Alikhanyan, A. S. [1 ]
机构：
[1] Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Moscow 119991, Russia
来源：
DOKLADY PHYSICAL CHEMISTRY | 2021年 / 501卷 / 02期
基金：
俄罗斯科学基金会;
关键词：
GeO2; GeO; high-temperature mass spectrometry; vaporization process; standard enthalpy; PHASE-EQUILIBRIA; GERMANIUM; PRESSURE;
D O I：
10.1134/S0012501621120010
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Vaporization of GeO2 (tetragonal and hexagonal) have been studied by the Knudsen effusion method in combination with mass spectrometry in the temperature range 1250-1370 K. It has been demonstrated that the saturated vapor over GeO2 consists of GeO and O-2 molecules. Partial pressures of the equilibrium vapor components and their temperature dependences have been determined. The standard enthalpy of the heterogeneous reaction GeO2(s) = GeO(g) + 1/2O(2(g)) and the standard enthalpy of formation of GeO2 (Delta H-f(298)degrees (GeO(g)) = -41.7 +/- 17.6 kJ mol(-1)) have been determined by the second- and third-law calculations.
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页码：119 / 125
页数：7
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