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Low temperature heat capacities and thermodynamic properties of 2-methyl-2-butanol
Tong Bo1,2; Tan Zhi-Cheng1,3; Wang Shao-Xu3; Tan ZC(谭志诚)
Keyword2-methyl-2-butanol Heat Capacity Phase Transition Thermodynamic Property
Source PublicationCHINESE JOURNAL OF CHEMISTRY
2008-09-01
Volume26Issue:9Pages:1561-1566
Indexed BySCI
SubtypeArticle
Department15
Funding Project1504
Contribution Rank1;1
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Multidisciplinary
WOS Research AreaChemistry
WOS KeywordMIXTURES ; CALORIMETER
AbstractThe low-temperature heat capacity C(p,m) of 2-methyl-2-butanol was precisely measured in the temperature range from 80 to 305 K by means of a small sample automated adiabatic calorimeter. Three solid-solid phase transitions and one solid-liquid phase transition were found at T = 146.355, 149.929, 214.395 and 262.706 K from the experimental C(p)-T curve, respectively. The dependence of heat capacity on temperature was fitted to the following polynomial equations with a least square method. In the temperature range of 80 to 140 K, C(p,m)=39.208+8.0724X-1.9583X(2)+10.06X(3)+1.799X(4)-7.2778X(5)+1.4919X(6),X=(T-110)/30; in the temperature range of 155 to 210 K, C(p,m) = 70.701+10.631X+12.767X(2)+0.3583X(3)-22.272X(4)-0.417X(5)+ 12.055X(6), X=(T-182.5)/27.5; in the temperature range of 220 to 250 K, C(p,m)= 99.176+7.7199X-26.138X(2)+28.949X(3)+0.7599X(4)-25.823X(5)+21.131X(6),X =(T-235)/15; and in the temperature range of 270 to 305 K, C(p,m)= 121.73+ 16.53X-1.0732X(2)-34.937X(3)-19.865X(4)+24.324X(5)+18.544X(6), X=(T- 287.5)/17.5. The molar enthalpies of these transitions were determined to be 0.9392, 1.541, 0.6646 and 2.239 kJ center dot mol(-1), respectively. The molar entropies of these transitions were determined to be 6.417, 10.28, 3.100 and 8.527 J center dot K(-1)center dot mol(-1), respectively. The thermodynamic functions [H(T)-H(298.15)] and [S(T)-S(298.15)], were derived from the heat capacity data in the temperature range of 80 to 305 K with an interval of 5 K.
Language英语
URL查看原文
WOS IDWOS:000259664300004
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/101437
Collection中国科学院大连化学物理研究所
Corresponding AuthorTan ZC(谭志诚)
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
3.Dalian Jiaotong Univ, Coll Environm & Chem Engn, Dalian 116028, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Tong Bo,Tan Zhi-Cheng,Wang Shao-Xu,et al. Low temperature heat capacities and thermodynamic properties of 2-methyl-2-butanol[J]. CHINESE JOURNAL OF CHEMISTRY,2008,26(9):1561-1566.
APA Tong Bo,Tan Zhi-Cheng,Wang Shao-Xu,&谭志诚.(2008).Low temperature heat capacities and thermodynamic properties of 2-methyl-2-butanol.CHINESE JOURNAL OF CHEMISTRY,26(9),1561-1566.
MLA Tong Bo,et al."Low temperature heat capacities and thermodynamic properties of 2-methyl-2-butanol".CHINESE JOURNAL OF CHEMISTRY 26.9(2008):1561-1566.
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