| 气态配合物Na2HfCl6的热力学性质 |
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| 作者单位： | 东北大学理学院,沈阳,110004;东北大学理学院,沈阳,110004;沈阳工业大学理学院,沈阳,110023 |
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| 摘 要： |
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| 关 键 词： | HfCl4 NaCl Na2HfCl6 气态配合物 相平衡-淬冷法 |
Thermodynamic Properties of Vapor Complex Na2HfCl6 |
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| Authors: | Jun-li Li Jin Yu Dong-mei Yang Zhi-chang Wang |
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| Abstract: | Thermodynamic studies were carried out for the vapor complex of sodium chloride with hafnium tetrachloride at 712-778 K and 0.5-3.1 kPa by using high temperature phase equilibrium-quenching experiments, with closed Pyrex glass ampoules as the reaction containers. The results show that the sole predominant vapor complex is Na2HfCl6 for the HfCl4-NaCl system under the experimental conditions. The thermodynamic equilibrium constants and other thermodynamic functions of the reaction 2NaCl(s)+HfCl4(g)=Na2HfCl6(g) have been derived from the measurements. The results for the changes in enthalpy and entropy are -65.5§1.5 kJ/mol and -99.6§2.0 J/(mol K) in the temperature range. |
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| Keywords: | HfCl4 NaCl Na2HfCl6 Vapor complex Phase equilibrium-quenching experiment |
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