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题名: Molar heat capacities and standard molar enthalpy of formation of 2-amino-5-methylpyridine
作者: Zhang, J. N.1, 4;  Tan, Z. C.1, 2;  Meng, Q. F.3, 4;  Shi, Q.1, 4;  Tong, B.1, 4;  Wang, S. X.2
通讯作者: 谭志诚
关键词: 2-amino-5-methylpyridine ;  low-temperature heat capacity ;  standard molar enthalpy of combustion ;  standard molar enthalpy of formation ;  thermodynamic function
刊名: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
发表日期: 2009-02-01
DOI: 10.1007/s10973-008-9267-9
卷: 95, 期:2, 页:461-467
收录类别: SCI ;  ISTP
文章类型: Article
部门归属: 15
项目归属: 1504
产权排名: 1;1
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: The heat capacities (C (p,m)) of 2-amino-5-methylpyridine (AMP) were measured by a precision automated adiabatic calorimeter over the temperature range from 80 to 398 K. A solid-liquid phase transition was found in the range from 336 to 351 K with the peak heat capacity at 350.426 K. The melting temperature (T (m)), the molar enthalpy (Delta(fus) H (m) (0) ), and the molar entropy (Delta(fus) S (m) (0) ) of fusion were determined to be 350.431 +/- 0.018 K, 18.108 kJ mol(-1) and 51.676 J K(-1) mol(-1), respectively. The mole fraction purity of the sample used was determined to be 0.99734 through the Van't Hoff equation. The thermodynamic functions (H (T)-H (298.15) and S (T)-S (298.15)) were calculated. The molar energy of combustion and the standard molar enthalpy of combustion were determined, Delta U (c)(C(6)H(8)N(2),cr)= -3500.15 +/- 1.51 kJ mol(-1) and Delta(c) H (m) (0) (C(6)H(8)N(2),cr)= -3502.64 +/- 1.51 kJ mol(-1), by means of a precision oxygen-bomb combustion calorimeter at T=298.15 K. The standard molar enthalpy of formation of the crystalline compound was derived, Delta(r) H (m) (0) (C(6)H(8)N(2),cr)= -1.74 +/- 0.57 kJ mol(-1).
关键词[WOS]: THERMODYNAMIC PROPERTIES ;  TEMPERATURE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000264133800021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/101887
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.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China
2.Dalian Jiaotong Univ, Coll Environm Sci & Engn, Dalian 116028, Peoples R China
3.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
4.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Zhang, J. N.,Tan, Z. C.,Meng, Q. F.,et al. Molar heat capacities and standard molar enthalpy of formation of 2-amino-5-methylpyridine[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2009,95(2):461-467.
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