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题名: Synthesis, Characterization and Thermochemistry of the Hydrated Barium Nicotinate
作者: Di You-Ying1;  Kong Yu-Xia1;  Zhang Shuang1;  Yang Wei-Wei1;  Wu En-Shen1;  Shi Quan2;  Tan Zhi-Cheng2
关键词: Ba(Nic)(2)center dot 3H(2)O(s) ;  Room temperature solid phase synthesis ;  Adiabatic calorimetry ;  Heat capacity at low temperature ;  Isoperibol solution-reaction calorimeter ;  Standard molar enthalpy of formation
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 2008-10-01
DOI: 10.3866/PKU.WHXB20081025
卷: 24, 期:10, 页:1884-1890
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: A new compound. barium nicotinate trihydrate, wits synthesized by the method of room temperature solid phase synthesis and ball grinder. FTIR, chemical and elemental analyses, and X-ray powder diffraction techniques were applied to characterize the structure and composition of the complex. Low-temperature heat capacities of the solid coordination compound were measured by it precision automated adiabatic calorimeter over the temperature range from 78 to 400 K. A phase transition process occurred in the temperature range of 312-332 K in the heat capacity curve, and the peak temperature, molar enthalpy and entropy of the solid-to-solid phase transition of the complex were determined to be its follows: T-trs=(327.097+/-1.082) K, Delta H-trs(m)=(16.793+/-0.084) kJ center dot mol(-1) and Delta S-trs(m) =(51.340+/- 0.164) J center dot K-1 center dot mol(-1). The experimental values of the molar heat capacities in the temperature regions of 7 8-311 K and 333-400 K were respectively fitted to two polynomial equations. The polynomial fitted values of the molar heat capacities and fundamental thermodynamic functions of the sample relative to the standard reference temperature of 298.15 K were calculated and tabulated at an interval of 5 K. In accordance with Hess law, it thermochemical cycle was designed, the reaction enthalpy of the solid phase reaction was determined its Delta H-t(m)0 =-(84.12+/-0.38) kJ center dot mol(-1), and the standard molar enthalpy of formation of the complex was calculated as Delta H-f(m)0 [Ba(Nic)(2) center dot 3H(2)O(s)]=-(2115.13+/-1.90) kJ center dot mol(-1) by using an isoperibol solution-reaction calorimeter.
关键词[WOS]: STANDARD MOLAR ENTHALPY ;  COMPLEX ;  ACID
语种: 英语
WOS记录号: WOS:000260347300025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141106
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:
Di You-Ying,Kong Yu-Xia,Zhang Shuang,et al. Synthesis, Characterization and Thermochemistry of the Hydrated Barium Nicotinate[J]. ACTA PHYSICO-CHIMICA SINICA,2008,24(10):1884-1890.
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