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题名: Low-temperature heat capacities and standard molar enthalpy of formation of aspirin
作者: Xu, F;  Sun, LX;  Tan, ZC;  Liang, JG;  Di, YY;  Tian, QF;  Zhang, T
关键词: adiabatic calorimetry ;  aspirin ;  combustion calorimetry ;  enthalpy of formation ;  heat capacity
刊名: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
发表日期: 2004
卷: 76, 期:2, 页:481-489
收录类别: SCI
文章类型: Article
项目归属: 1504,1501
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: Molar heat capacities (C-p,C-m) of aspirin were precisely measured with a small sample precision automated adiabatic calorimeter over the temperature range from 78 to 383 K. No phase transition was observed in this temperature region. The polynomial function of Cp, vs. T was established in the light of the low-temperature heat capacity measurements and least square fitting method. The corresponding function is as follows: for 78 Kless than or equal toTless than or equal to383 K, C-p,C-m/J mol(-1) K-1=19.086X(4)+15.951X(3)-5.2548X(2)+90.192X+176.65, [X=(T-230.50/152.5)]. The thermodynamic functions on the base of the reference temperature of 298.15 K, {DeltaH(T)-DeltaH(298.15)} and {S-T-S-298.15}, were derived.
关键词[WOS]: THERMODYNAMIC PROPERTIES ;  ACID ;  GRAPHITE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000221460800012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/81463
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, Mat Thermochem Lab, Dalian 116023, Peoples R China
2.Hunan Inst Drug Detect, Changsha 410001, Peoples R China

Recommended Citation:
Xu, F,Sun, LX,Tan, ZC,et al. Low-temperature heat capacities and standard molar enthalpy of formation of aspirin[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2004,76(2):481-489.
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