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Low-temperature heat capacities and standard molar enthalpy of formation of N-methylnorephedrine C11H17NO(s)
Di You-Ying1; Wang Da-Qi1; Shi Quan2; Tan Zhi-Cheng2; Tan ZC(谭志诚); Tan ZC(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
2008-08-01
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
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WOS记录号WOS:000258480200018
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/100411
专题中国科学院大连化学物理研究所
通讯作者Tan ZC(谭志诚); Tan ZC(谭志诚)
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
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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.
APA Di You-Ying,Wang Da-Qi,Shi Quan,Tan Zhi-Cheng,谭志诚,&谭志诚.(2008).Low-temperature heat capacities and standard molar enthalpy of formation of N-methylnorephedrine C11H17NO(s).CHINESE PHYSICS B,17(8),2859-2866.
MLA Di You-Ying,et al."Low-temperature heat capacities and standard molar enthalpy of formation of N-methylnorephedrine C11H17NO(s)".CHINESE PHYSICS B 17.8(2008):2859-2866.
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