| Low-Temperature Heat Capacities and Thermodynamic Properties of Hydrated Nickel L-Threonate Ni（C4H7O5）2·2H2O（S） |
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| 引用本文： | 邱友莹 谭志诚 高胜利 陈三平 孙立贤. Low-Temperature Heat Capacities and Thermodynamic Properties of Hydrated Nickel L-Threonate Ni（C4H7O5）2·2H2O（S）[J]. 中国化学, 2007, 25(3): 89-294. DOI: 10.1002/cjoc.200790057 |
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| 作者姓名： | 邱友莹 谭志诚 高胜利 陈三平 孙立贤 |
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| 作者单位： | [1]College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059 China [2]Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China [3]Department of Chemistry, Northwest University, Xi＇an, Shaanxi 710069, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （No. 20673050）, the Poat-doctor Start-up Foundation of Liaocheng Univer sity （No. 31805）. |
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| 摘 要： | Low-temperature heat capacities of the compound Ni（C4H7O5）2·2H2O（S） have been measured with an auto- mated adiabatic calorimeter. A thermal decomposition or dehydration occurred in 350--369 K. The temperature, the enthalpy and entropy of the dehydration were determined to be （368.141 ±0.095） K, （18.809±0.088） kJ·mol ^-1 and （51.093±0.239） J·K^-1·mol^-1 respertively. The experimental values of the molar heat capacities in the temperature regions of 78-350 and 368-390 K were fitted to two polynomial equations of heat capacities （Cp,m） with the reduced temperatures （X）, [X=f（T）], by a least squares method, respectively. The smoothed molar heat capacities and thermodynamic functions of the compound were calculated on the basis of the fitted polynomials. The smoothed values of the molar heat capacities and fundamental thermodynamic functions of the sample relative to the standard reference temperature 298.15 K were tabulated with an interval of 5 K.
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| 关 键 词： | L-苏糖酸镍水合物 低温热容量 热力学性质 绝热量热法 |
| 修稿时间： | 2006-06-19 |
Low‐Temperature Heat Capacities and Thermodynamic Properties of Hydrated Nickel L‐Threonate Ni(C4H7O5)2·2H2O(s) |
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| DI You-Ying, TAN Zhi-Cheng , GAO Sheng-Li, CHEN San-Ping, SUN Li-Xian. Low‐Temperature Heat Capacities and Thermodynamic Properties of Hydrated Nickel L‐Threonate Ni(C4H7O5)2·2H2O(s)[J]. Chinese Journal of Chemistry, 2007, 25(3): 89-294. DOI: 10.1002/cjoc.200790057 |
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| Authors: | DI You-Ying TAN Zhi-Cheng GAO Sheng-Li CHEN San-Ping SUN Li-Xian |
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| Affiliation: | 1. Tel.: 0086‐0635‐8538299;2. Fax: 0086‐0635‐8239121;3. College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059 China;4. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China;5. Department of Chemistry, Northwest University, Xi'an, Shaanxi 710069, China |
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| Abstract: | Low‐temperature heat capacities of the compound Ni(C4H7O5)2·2H2O(s) have been measured with an automated adiabatic calorimeter. A thermal decomposition or dehydration occurred in 350–369 K. The temperature, the enthalpy and entropy of the dehydration were determined to be (368.141±0.095) K, (18.809±0.088) kJ·mol?1 and (51.093±0.239) J·K?1·mol?1 respertively. The experimental values of the molar heat capacities in the temperature regions of 78–350 and 368–390 K were fitted to two polynomial equations of heat capacities (Cp,m) with the reduced temperatures (X), [X = f (T)], by a least squares method, respectively. The smoothed molar heat capacities and thermodynamic functions of the compound were calculated on the basis of the fitted polynomials. The smoothed values of the molar heat capacities and fundamental thermodynamic functions of the sample relative to the standard reference temperature 298.15 K were tabulated with an interval of 5 K. |
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| Keywords: | Ni(C4H7O5)2·2H2O(s) adiabatic calorimetry low‐temperature heat capacity dehydration process thermodynamic property |
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