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题名: Low-temperature heat capacities and standard molar enthalpy of formation of N-methylnorephedrine C11H17NO(s)
作者: Di You-Ying1;  Wang Da-Qi1;  Shi Quan2;  Tan Zhi-Cheng2
通讯作者: 谭志诚
关键词: N-methylnorephedrine C11H17NO(s) ;  heat capacity ;  constant-volume energy of combustion ;  standard molar enthalpy of formation
刊名: CHINESE PHYSICS B
发表日期: 2008-08-01
卷: 17, 期:8, 页:2859-2866
收录类别: SCI
文章类型: Article
部门归属: 15
项目归属: 1504
产权排名: 2;3
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Physics, Multidisciplinary
研究领域[WOS]: Physics
英文摘要: This paper reports that low-temperature heat capacities of N-methylnorephedrine C11H17NO(s) have been measured by a precision automated adiabatic calorimeter over the temperature range from T=78 K to T=400 K. A solid to liquid phase transition of the compound was found in the heat capacity curve in the temperature range of T=342-364 K. The peak temperature, molar enthalpy and entropy of fusion of the substance were determined. The experimental values of the molar heat capacities in the temperature regions of T=78-342 K and T=364-400 K were fitted to two polynomial equations of heat capacities with the reduced temperatures by least squares method. The smoothed molar heat capacities and thermodynamic functions of N-methylnorephedrine C11H17NO(s) relative to the standard reference temperature 298.15 K were calculated based on the fitted polynomials and tabulated with an interval of 5 K. The constant-volume energy of combustion of the compound at T=298.15 K was measured by means of an isoperibol precision oxygen-bomb combustion calorimeter. The standard molar enthalpy of combustion of the sample was calculated. The standard molar enthalpy of formation of the compound was determined from the combustion enthalpy and other auxiliary thermodynamic data through a Hess thermochemical cycle.
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000258480200018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/100411
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:
Di You-Ying,Wang Da-Qi,Shi Quan,et al. Low-temperature heat capacities and standard molar enthalpy of formation of N-methylnorephedrine C11H17NO(s)[J]. CHINESE PHYSICS B,2008,17(8):2859-2866.
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