lowtemperatureheatcapacitiesandstandardmolarenthalpyofformationofnmethylnorephedrinec11h17nos

	lowtemperatureheatcapacitiesandstandardmolarenthalpyofformationofnmethylnorephedrinec11h17nos
	Di YouYing 1; Wang DaQi 1; Shi Quan 2; Tan ZhiCheng 2
刊名	chinesephysicsb
	2008-01-01
卷号	17 期号:8 页码:2859
ISSN号	1674-1056
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.
资助项目	[National Natural Science Foundation of China]
语种	英语
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/175547]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.聊城大学 2.中国科学院大连化学物理研究所
推荐引用方式 GB/T 7714	Di YouYing,Wang DaQi,Shi Quan,et al. lowtemperatureheatcapacitiesandstandardmolarenthalpyofformationofnmethylnorephedrinec11h17nos[J]. chinesephysicsb,2008,17(8):2859.
APA	Di YouYing,Wang DaQi,Shi Quan,&Tan ZhiCheng.(2008).lowtemperatureheatcapacitiesandstandardmolarenthalpyofformationofnmethylnorephedrinec11h17nos.chinesephysicsb,17(8),2859.
MLA	Di YouYing,et al."lowtemperatureheatcapacitiesandstandardmolarenthalpyofformationofnmethylnorephedrinec11h17nos".chinesephysicsb 17.8(2008):2859.