Heat Capacities and Thermodynamic Properties of Pinnoite and Inderite
In this paper, in order to understand the thermodynamic properties of natural minerals of pinnoite (MgB2O4·3H2O, Pin) and inderite (Mg2B6O11·15H2O, Ind) deposited in salt lakes, heat capacities of two minerals were measured using a precision calorimeter at temperatures from 306.15 to 355.15 K after...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2020/6181356 |
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| author | Hanyu Zheng Kangrui Sun Long Li Yafei Guo Tianlong Deng |
| author_facet | Hanyu Zheng Kangrui Sun Long Li Yafei Guo Tianlong Deng |
| author_sort | Hanyu Zheng |
| collection | DOAJ |
| description | In this paper, in order to understand the thermodynamic properties of natural minerals of pinnoite (MgB2O4·3H2O, Pin) and inderite (Mg2B6O11·15H2O, Ind) deposited in salt lakes, heat capacities of two minerals were measured using a precision calorimeter at temperatures from 306.15 to 355.15 K after the high purity was synthesized. It was found that there are no phase transitions and thermal anomalies for the two minerals, and the molar heat capacities against temperature for Pin and Ind were fitted as Cp,m,pin = −2029.47058 + 16.94666T − 0.04396T2 + 3.89409×10−5T3 and Cp,m,Ind = −30814.43795 + 282.68108T − 0.85605T2 + 8.70708×10−4T 3, respectively. On the basis of molar heat capacities (Cp,m) of Pin and Ind, the thermodynamic functions of entropy, enthalpy, and Gibbs free energy at the temperature of 1 K interval for the two minerals were obtained for the first time. |
| format | Article |
| id | doaj-art-f6c7345b11c644f89f1bb78edb9be878 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-f6c7345b11c644f89f1bb78edb9be8782025-02-03T06:06:44ZengWileyJournal of Chemistry2090-90632090-90712020-01-01202010.1155/2020/61813566181356Heat Capacities and Thermodynamic Properties of Pinnoite and InderiteHanyu Zheng0Kangrui Sun1Long Li2Yafei Guo3Tianlong Deng4Tianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, ChinaTianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, ChinaTianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, ChinaTianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, ChinaTianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, ChinaIn this paper, in order to understand the thermodynamic properties of natural minerals of pinnoite (MgB2O4·3H2O, Pin) and inderite (Mg2B6O11·15H2O, Ind) deposited in salt lakes, heat capacities of two minerals were measured using a precision calorimeter at temperatures from 306.15 to 355.15 K after the high purity was synthesized. It was found that there are no phase transitions and thermal anomalies for the two minerals, and the molar heat capacities against temperature for Pin and Ind were fitted as Cp,m,pin = −2029.47058 + 16.94666T − 0.04396T2 + 3.89409×10−5T3 and Cp,m,Ind = −30814.43795 + 282.68108T − 0.85605T2 + 8.70708×10−4T 3, respectively. On the basis of molar heat capacities (Cp,m) of Pin and Ind, the thermodynamic functions of entropy, enthalpy, and Gibbs free energy at the temperature of 1 K interval for the two minerals were obtained for the first time.http://dx.doi.org/10.1155/2020/6181356 |
| spellingShingle | Hanyu Zheng Kangrui Sun Long Li Yafei Guo Tianlong Deng Heat Capacities and Thermodynamic Properties of Pinnoite and Inderite Journal of Chemistry |
| title | Heat Capacities and Thermodynamic Properties of Pinnoite and Inderite |
| title_full | Heat Capacities and Thermodynamic Properties of Pinnoite and Inderite |
| title_fullStr | Heat Capacities and Thermodynamic Properties of Pinnoite and Inderite |
| title_full_unstemmed | Heat Capacities and Thermodynamic Properties of Pinnoite and Inderite |
| title_short | Heat Capacities and Thermodynamic Properties of Pinnoite and Inderite |
| title_sort | heat capacities and thermodynamic properties of pinnoite and inderite |
| url | http://dx.doi.org/10.1155/2020/6181356 |
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