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Synthesis, characterization and thermochemistry of anhydrous potassium nicotinate
Kong Yu-Xia2; Li Yue-Bao2; Yang Wei-Wei2; Di You-Ying2; Shi Quan1; Tan Zhi-Cheng1
关键词Anhydrous Potassium Nicotinate Adiabatic Calorimetry Low-temperature Heat Capacity Isoperibol Solution-reaction Calorimetry Standard Molar Enthalpy Of Formation
刊名ACTA CHIMICA SINICA
2008-03-28
66期:6页:609-616
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
关键词[WOS]STANDARD MOLAR ENTHALPY
英文摘要Nicotinic acid and anhydrous potassium acetate were chosen as the reactants, and a novel compound-anhydrous potassium nicotinate was synthesized by the method of room temperature solid phase synthesis. FTIR and X-ray powder diffraction techniques were applied to characterize its structure. Low-temperature heat capacities of the K(C(6)H(4)NO(2))(S) were measured with a small sample precision automated adiabatic calorimeter over the temperature range from 77 to 400 K. A polynomial equation of the heat capacities as a function of the temperature was fitted by the least square method. Based on the fitted polynomial, the smoothed heat capacities and thermodynamic functions of the compound relative to the standard reference temperature 298.15 K were calculated and tabulated at the interval of 5 K. A reasonable thermochemical cycle was designed, and the standard molar enthalpies of dissolution for the reactants and products of the solid phase reaction in the selected solvent were measured by an isoperibol solution-reaction calorimeter, respectively. In addition, the enthalpy change of the solid phase reaction was calculated to be Delta(r)H(m)(circle minus)= (25.87 +/- 0.47) kJ.mol(-1) from the data of the above standard molar enthalpies of dissolution. Finally, the standard molar enthalpy of formation of anhydrous potassium nicotinate K(C(6)H(4)NO(2))(S) was determinedtobe Delta(f)H(m)(circle minus)[K(C(6)H(4)NO(2)),s] = -(560.57 +/- 1.09) kJ.mol(-1) in accordance with Hess law.
语种英语
WOS记录号WOS:000255103800004
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/140803
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Thermochem Lab, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Liaocheng Univ, Coll Chem & Chem Engn, Liaocheng 252059, Peoples R China
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Kong Yu-Xia,Li Yue-Bao,Yang Wei-Wei,et al. Synthesis, characterization and thermochemistry of anhydrous potassium nicotinate[J]. ACTA CHIMICA SINICA,2008,66(6):609-616.
APA Kong Yu-Xia,Li Yue-Bao,Yang Wei-Wei,Di You-Ying,Shi Quan,&Tan Zhi-Cheng.(2008).Synthesis, characterization and thermochemistry of anhydrous potassium nicotinate.ACTA CHIMICA SINICA,66(6),609-616.
MLA Kong Yu-Xia,et al."Synthesis, characterization and thermochemistry of anhydrous potassium nicotinate".ACTA CHIMICA SINICA 66.6(2008):609-616.
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