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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)
KeywordN-methylnorephedrine C11h17no(s) Heat Capacity Constant-volume Energy Of Combustion Standard Molar Enthalpy Of Formation
Source PublicationCHINESE PHYSICS B
2008-08-01
Volume17Issue:8Pages:2859-2866
Indexed BySCI
SubtypeArticle
Department15
Funding Project1504
Contribution Rank2;3
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectPhysics, Multidisciplinary
WOS Research AreaPhysics
AbstractThis 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.
Language英语
URL查看原文
WOS IDWOS:000258480200018
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/100411
Collection中国科学院大连化学物理研究所
Corresponding AuthorTan ZC(谭志诚); Tan ZC(谭志诚)
Affiliation1.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
GB/T 7714
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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