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题名: Synthesis, Structure Characterization and Thermochemistry of Anhydrous Lithium Benzoinate
作者: He Dong-Hua1;  Di You-Ying1;  Yang Wei-Wei1;  Kong Yu-Xia1;  Dan Wen-Yan1;  Tan Zhi-Cheng2
关键词: Lithium benzoinate ;  Adiabatic calorimetry ;  Low-temperature heat capacity ;  Solution-reaction calorimeter ;  Standard molar enthalpy of formation
刊名: CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
发表日期: 2009-11-10
卷: 30, 期:11, 页:2258-2262
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Benzoic acid and lithium hydroxide with the analytical grade were chosen as the reactants, and the lithium benzoinate was synthesized by means of hydrothermal synthesis. XRD, FTIR and elementary and chemical analyses were applied to characterize its composition and structure. Low-temperature heat capacities of the compound were measured via a precision automated adiabatic calorimeter over the temperature range from 80-400 K. A polynomial equation of the heat capacities as a function of the temperature was fitted by the least square method. A reasonable thermochemical cycle was designed on the basis of the preparation reaction of the substance, 0.1 mol/L of HCl solution was chosen as the calorimetric solvent, and the standard molar enthalpies of dissolution for the reactants and products of the hydrothermal reaction in the selected solvents were measured by an isoperibol solution-reaction calorimeter, respectively. The enthalpy change of the preparation reaction was determined as Delta(r)H(m)((sic)) = -(9. 75 +/- 0. 27) kJ/mol from the standard molar enthalpies of dissolution. Eventually, the standard molar enthalpy of formation of anhydrous lithium benzoinate was derived to be Delta(f)H(m)((sic)) = -(307.82 +/- 0.57) kJ/mol by Hess's law.
语种: 英语
WOS记录号: WOS:000272832200030
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141524
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, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China

Recommended Citation:
He Dong-Hua,Di You-Ying,Yang Wei-Wei,et al. Synthesis, Structure Characterization and Thermochemistry of Anhydrous Lithium Benzoinate[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2009,30(11):2258-2262.
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