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题名: Low-Temperature Heat Capacities and Standard Molar Enthalpy of Formation of Dichloro Bis(2-aminopyridine) Zinc (II), ZnCl2(C5H6N2)(2)(s)
作者: Dan, Wen-Yan1;  Di, You-Ying1;  Liu, Yan-Juan1;  Kong, Yu-Xia1;  Tan, Zhi-Cheng2
关键词: Dichloro bis(2-aminopyridine) zinc (II) ;  Low-temperature heat capacity ;  Standard molar enthalpy of dissolution ;  Standard molar enthalpy of formation ;  Thermodynamic function ;  X-ray crystallography
刊名: INTERNATIONAL JOURNAL OF THERMOPHYSICS
发表日期: 2010-12-01
DOI: 10.1007/s10765-010-0887-5
卷: 31, 期:11-12, 页:2103-2118
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Thermodynamics ;  Chemistry, Physical ;  Mechanics ;  Physics, Applied
研究领域[WOS]: Thermodynamics ;  Chemistry ;  Mechanics ;  Physics
英文摘要: Dichloro bis(2-aminopyridine) zinc (II), ZnCl2(C5H6N2)(2)(s), was synthesized by the method of solvonthermal synthesis in which 2-aminopyridine and zinc chloride were chosen as the reactants. X-ray crystallography, chemical analysis, and elemental analysis were applied to characterize the structure and composition of the complex. Low-temperature heat capacities of the title compound were measured with a precise small-sample automated adiabatic calorimeter over the temperature range from 78 K to 398 K. A polynomial equation of the heat capacities as a function of temperature was fitted by a least-squares method. Smoothed heat capacities and thermodynamic functions of the compound relative to the standard reference temperature (298.15 K) were calculated and tabulated at intervals of 5 K based on the fitted polynomial. A reasonable thermochemical cycle was designed, and the standard molar enthalpies of dissolution for the reactants and products of the synthesis reaction in a selected solvent were measured by an isoperibol solution-reaction calorimeter. In addition, the enthalpy change of the reaction was calculated from the data of the above standard molar enthalpies of dissolution. Finally, the standard molar enthalpy of formation of the complex ZnCl2(C5H6N2)(2)(s) was determined to be -(400.52 +/- 1.66) kJ center dot mol(-1) in accordance with Hess's law.
关键词[WOS]: COORDINATION-COMPOUND
语种: 英语
WOS记录号: WOS:000285065300005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141831
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Liaocheng Univ, Coll Chem & Chem Engn, Liaocheng 252059, Shandong, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China

Recommended Citation:
Dan, Wen-Yan,Di, You-Ying,Liu, Yan-Juan,et al. Low-Temperature Heat Capacities and Standard Molar Enthalpy of Formation of Dichloro Bis(2-aminopyridine) Zinc (II), ZnCl2(C5H6N2)(2)(s)[J]. INTERNATIONAL JOURNAL OF THERMOPHYSICS,2010,31(11-12):2103-2118.
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