A. S. Smirnov, K. G. Smorchkov, N. A. Gribchenkova, A. S. Alikhanyan
{"title":"Vaporization Thermodynamics of GeO2 by High-Temperature Mass Spectrometry","authors":"A. S. Smirnov, K. G. Smorchkov, N. A. Gribchenkova, A. S. Alikhanyan","doi":"10.1134/S0012501621120010","DOIUrl":null,"url":null,"abstract":"<p>Vaporization of GeO<sub>2</sub> (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 GeO<sub>2</sub> consists of GeO and O<sub>2</sub> molecules. Partial pressures of the equilibrium vapor components and their temperature dependences have been determined. The standard enthalpy of the heterogeneous reaction GeO<sub>2(s)</sub> = GeO<sub>(g)</sub> + 1/2O<sub>2(g)</sub> and the standard enthalpy of formation of GeO<sub>2</sub> (∆<sub><i>f</i></sub><i>H</i><span>\\(_{{298}}^{^\\circ }\\)</span>(GeO<sub>(g)</sub>) = −41.7 ± 17.6 kJ mol<sup>–1</sup>) have been determined by the second- and third-law calculations.</p>","PeriodicalId":532,"journal":{"name":"Doklady Physical Chemistry","volume":"501 2","pages":"119 - 125"},"PeriodicalIF":1.1000,"publicationDate":"2022-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Doklady Physical Chemistry","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S0012501621120010","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
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 O2 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) + 1/2O2(g) and the standard enthalpy of formation of GeO2 (∆fH\(_{{298}}^{^\circ }\)(GeO(g)) = −41.7 ± 17.6 kJ mol–1) have been determined by the second- and third-law calculations.
期刊介绍：
Doklady Physical Chemistry is a monthly journal containing English translations of current Russian research in physical chemistry from the Physical Chemistry sections of the Doklady Akademii Nauk (Proceedings of the Russian Academy of Sciences). The journal publishes the most significant new research in physical chemistry being done in Russia, thus ensuring its scientific priority. Doklady Physical Chemistry presents short preliminary accounts of the application of the state-of-the-art physical chemistry ideas and methods to the study of organic and inorganic compounds and macromolecules; polymeric, inorganic and composite materials as well as corresponding processes. The journal is intended for scientists in all fields of chemistry and in interdisciplinary sciences.
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