| 气态配合物Na2HfCl6的热力学性质 |
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| 引用本文： | 李军丽,于锦,杨冬梅,王之昌.气态配合物Na2HfCl6的热力学性质[J].化学物理学报,2007,20(2):180-184. |
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| 作者姓名： | 李军丽 于锦 杨冬梅 王之昌 |
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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,东北大学理学院，沈阳110004,东北大学理学院，沈阳110004 |
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| 基金项目： | This work was supported by the National Natural Science Foundation of China (No.50274027). |
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| 摘 要： | 以密闭的Pyrex玻璃瓶为反应器，用高温相平衡-淬冷实验方法，在712-778 K和0.5-3.1 kPa下研究了NaCl与HfCl4的反应热力学．结果显示，Na2HfCl6(g)是HfCl4-NaCl二元系中唯一反应产物．由实验结果计算了反应2NaCl(s)+HfCl4(g)=Na2HfCl6(g)的热力学平衡常数，并计算出该温度范围内反应的焓变为-65.5±1.5 kJ/mol和反应的熵变为-99.6±2.0 J/molK．
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| 关 键 词： | HfCl4，NaCl，Na2HfCl6，气态配合物，相平衡-淬冷法 |
| 收稿时间： | 2006/5/19 0:00:00 |
Thermodynamic Properties of Vapor Complex Na2HfCl6 |
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| Jun-li Li,Jin Yu,Dong-mei Yang and Zhi-chang Wang.Thermodynamic Properties of Vapor Complex Na2HfCl6[J].Chinese Journal of Chemical Physics,2007,20(2):180-184. |
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| Authors: | Jun-li Li Jin Yu Dong-mei Yang and Zhi-chang Wang |
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| Institution: | School of Sciences, Northeastern University, Shenyang 110004, China,School of Sciences, Northeastern University, Shenyang 110004, China; School of Sciences, Shenyang University of Technology, Shenyang 110023, China,School of Sciences, Northeastern University, Shenyang 110004, China,School of Sciences, Northeastern University, Shenyang 110004, China |
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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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