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Low-temperature heat capacities and thermodynamic properties of 2,2-dimethyl-1,3-propanediol
Tong, B.; Tan, Z.-C.; Lv, X. C.; Sun, L. X.; Xu, F.; Shi, Q.; Li, Y. S.
KeywordAdiabatic Calorimetry Dsc 2 Heat Capacity 2-dimethyl-1 Phase Transition 3-propanediol Tg Thermodynamic Properties
Source PublicationJOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
2007-10-01
DOI10.1007/s10973-006-7672-5
Volume90Issue:1Pages:217-221
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Analytical ; Chemistry, Physical
WOS Research AreaChemistry
WOS KeywordPHASE-TRANSITIONS
AbstractThe molar heat capacities C (p,m) of 2,2-dimethyl-1,3-propanediol were measured in the temperature range from 78 to 410 K by means of a small sample automated adiabatic calorimeter. A solid-solid and a solid-liquid phase transitions were found at T-314.304 and 402.402 K, respectively, from the experimental C (p)-T curve. The molar enthalpies and entropies of these transitions were determined to be 14.78 kJ mol(-1), 47.01 J K-1 mol(-1) for the solid-solid transition and 7.518 kJ mol(-1), 18.68 J K-1 mol(-1) for the solid-liquid transition, respectively. The dependence of heat capacity on the temperature was fitted to the following polynomial equations with least square method. In the temperature range of 80 to 310 K, C (p,m)/(J K-1 mol(-1))=117.72+58.8022x+3.0964x(2)+6.87363x (3)-13.922x(4)+9.8889x(5)+16.195x(6); x=[(T/K)-195]/115. In the temperature range of 325 to 395 K, C (p,m)/(J K-1 mol(-1))=290.74+22.767x-0.6247x 2-0.8716x 3-4.0159x 4-0.2878x 5+1.7244x 6; x=[(T/K)-360]/35. 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 410 K with an interval of 5 K. The thermostability of the compound was further tested by DSC and TG measurements. The results were in agreement with those obtained by adiabatic calorimetry.
Language英语
WOS IDWOS:000249652300028
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/140706
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China
2.Dalian Jiaotong Univ, Coll Environm Sci & Engn, Dalian 116028, Peoples R China
Recommended Citation
GB/T 7714
Tong, B.,Tan, Z.-C.,Lv, X. C.,et al. Low-temperature heat capacities and thermodynamic properties of 2,2-dimethyl-1,3-propanediol[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2007,90(1):217-221.
APA Tong, B..,Tan, Z.-C..,Lv, X. C..,Sun, L. X..,Xu, F..,...&Li, Y. S..(2007).Low-temperature heat capacities and thermodynamic properties of 2,2-dimethyl-1,3-propanediol.JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,90(1),217-221.
MLA Tong, B.,et al."Low-temperature heat capacities and thermodynamic properties of 2,2-dimethyl-1,3-propanediol".JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 90.1(2007):217-221.
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