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Low Temperature Heat Capacities and Standard Molar Enthalpy of Formation of 2-Pyrazinecarboxylic Acid (C5H4N2O2)(s)
Kong, Yu-Xia1; Di, You-Ying1; Yang, Wei-Wei1; Gao, Sheng-Li2; Tan, Zhi-Cheng3
关键词2-pyrazinecarboxylic Acid Adiabatic Calorimetry Low Temperature Heat Capacity Rotating-bomb Combustion Calorimeter Standard Molar Enthalpy Of Formation
刊名ACTA CHIMICA SLOVENICA
2010
57期:2页:370-375
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]MAGNETIC-PROPERTIES ; COMPLEX
英文摘要Low-temperature heat capacities of 2-pyrazinecarboxylic acid (C5H4N2O2)(s) were measured by a precision automated adiabatic calorimeter over the temperature range from 78 to 400 K. A polynomial equation of heat capacities as a function of temperature was fitted by least squares 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 10 K intervals. The constant-volume energy of combustion of the compound at T = 298.15 K was measured by a precision rotating-bomb combustion calorimeter to be Delta U-c = -(17839.40 +/- 7.40) J g(-1). The standard molar enthalpy of combustion of the compound was determined to be Delta H-c(m)0 = -( 2211.39 +/- 0.92) KJ mol(-1), according to the definition of combustion enthalpy. Finally, the standard molar enthalpy of formation of the compound was calculated to be Delta H-f(m)0 = -(327.82 +/- 1.13) kJ mol(-1) in accordance with Hess law.
语种英语
WOS记录号WOS:000279939100014
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/141821
专题中国科学院大连化学物理研究所
作者单位1.Liaocheng Univ, Coll Chem & Chem Engn, Liaocheng 252059, Peoples R China
2.NW Univ Xian, Dept Chem, Xian 710069, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China
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GB/T 7714
Kong, Yu-Xia,Di, You-Ying,Yang, Wei-Wei,et al. Low Temperature Heat Capacities and Standard Molar Enthalpy of Formation of 2-Pyrazinecarboxylic Acid (C5H4N2O2)(s)[J]. ACTA CHIMICA SLOVENICA,2010,57(2):370-375.
APA Kong, Yu-Xia,Di, You-Ying,Yang, Wei-Wei,Gao, Sheng-Li,&Tan, Zhi-Cheng.(2010).Low Temperature Heat Capacities and Standard Molar Enthalpy of Formation of 2-Pyrazinecarboxylic Acid (C5H4N2O2)(s).ACTA CHIMICA SLOVENICA,57(2),370-375.
MLA Kong, Yu-Xia,et al."Low Temperature Heat Capacities and Standard Molar Enthalpy of Formation of 2-Pyrazinecarboxylic Acid (C5H4N2O2)(s)".ACTA CHIMICA SLOVENICA 57.2(2010):370-375.
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