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题名: Synthesis, characterization, and thermodynamic study of ammonium benzoate C7H5O2NH4(s)
作者: Yang, Wei-Wei1;  Di, You-Ying1;  Kong, Yu-Xia1;  Guo, Xiao-Yang1;  Tan, Zhi-Cheng2
关键词: C7H5O2NH4(s) ;  Adiabatic calorimeter ;  Low-temperature heat capacity ;  Isoperibol solution-reaction calorimeter ;  Standard molar enthalpy of formation
刊名: THERMOCHIMICA ACTA
发表日期: 2010-04-20
DOI: 10.1016/j.tca.2010.01.021
卷: 502, 期:1-2, 页:14-19
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical ;  Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Benzoic acid and concentrated ammonia were chosen as reactants and a novel compound (ammonium benzoate) was synthesized using the method of liquid phase reaction. FTIR, elemental analysis and X-ray powder diffraction technique were applied to characterize the structure and composition of the compound. Low-temperature heat capacities of the solid compound were measured by a precision automated adiabatic calorimeter over the temperature range from 80 to 399K. A polynomial equation of the heat capacities was fitted by the least-squares method. In accordance with Hess' law, a thermochemical cycle was designed, the enthalpy change of the reaction of benzoic acid with ammonium acetate was determined as Delta H-r(m)degrees = (15.59 +/- 0.50) kJ mol(-1), and the standard molar enthalpy of formation of the compound was calculated as Delta H-f(m)degrees [C7H5O2NH4,S] = -(472.65 +/- 0.62) kJ mol(-1) by an isoperibol solution-reaction calorimeter. (C) 2010 Elsevier B.V. All rights reserved.
关键词[WOS]: ACIDS ;  HEAT
语种: 英语
WOS记录号: WOS:000277492800003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141980
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:
Yang, Wei-Wei,Di, You-Ying,Kong, Yu-Xia,et al. Synthesis, characterization, and thermodynamic study of ammonium benzoate C7H5O2NH4(s)[J]. THERMOCHIMICA ACTA,2010,502(1-2):14-19.
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