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题名: Low-Temperature Heat Capacity and Thermodynamic Functions of Ho(NO3)(3)(C2H5O2N)(4)center dot H2O
作者: Gao Xiao-Han1;  Xu Pei1;  Duan Wen-Chao1;  Lu Xue-Chuan1;  Tan Zhi-Cheng2;  Lu Qiang1
关键词: Rare earth complex ;  Ho(NO3)(3)(C2H5O2N)(4)center dot H2O ;  Adiabatic calorimetry ;  Heat capacity ;  Thermodynamic function ;  Thermal analysis
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 2013-10-01
DOI: 10.3866/PKU.WHXB201306051
卷: 29, 期:10, 页:2123-2128
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: A complex of a rare-earth metal (Ho) nitrate with glycine (C2H5O2N), Ho(NO3)(3)(C2H5O2N)(4)center dot H2O, was synthesized, and characterized by chemical analysis, elemental analysis, and infrared (IR) spectroscopy. The thermodynamic properties of the complex were also studied. The low-temperature molar heat capacities at constant pressure (C-p,C-m) of the complex were measured using a high-precision automatic adiabatic calorimeter over the temperature range from 80 to 390 K. The experimental molar heat capacities at constant pressure were used to deduce the polynomial equations for the heat capacity as a function of reduced temperature by applying the least-squares method to the two smooth stages of the curve. Based on the thermodynamic relationships among heat capacity, entropy, and enthalpy, the thermodynamic functions (H-T,H-m - H-298.15,H-m) and (S-T,S-m - S-298.15,S-m) were derived from the heat capacity data, with temperature intervals of 5 K. The molar enthalpy and entropy changes of the transition process at about 350 K (Delta H-trs(m) and Delta S-trs(m)) were calculated from the heat capacity curve. The thermal stability of the complex was determined using differential scanning calorimetry (DSC).
关键词[WOS]: ADIABATIC CALORIMETRY ;  STANDARD ENTHALPIES ;  COMPLEXES ;  RE
语种: 英语
WOS记录号: WOS:000324861700009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137949
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.Liaoning Shihua Univ, Coll Chem & Chem Engn & Environm Engn, Sch Chem & Mat Sci, Fushun 113001, Liaoning Provin, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Liaoning Provin, Peoples R China

Recommended Citation:
Gao Xiao-Han,Xu Pei,Duan Wen-Chao,et al. Low-Temperature Heat Capacity and Thermodynamic Functions of Ho(NO3)(3)(C2H5O2N)(4)center dot H2O[J]. ACTA PHYSICO-CHIMICA SINICA,2013,29(10):2123-2128.
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