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题名: Low-temperature heat capacities and standard molar enthalpy of formation of chromium nicotinate Cr(C6H4NO2)(3)(s)
作者: Di, You-Ying1;  Yang, Wei-Wei1;  Kong, Yu-Xia1;  Shi, Quan2;  Tan, Zhi-Cheng2
通讯作者: 邸友莹
刊名: JOURNAL OF CHEMICAL AND ENGINEERING DATA
发表日期: 2008
DOI: 10.1021/je7004006
卷: 53, 期:1, 页:94-99
收录类别: SCI
文章类型: Article
部门归属: 15
项目归属: 1504
产权排名: 2;4
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Multidisciplinary ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Low-temperature heat capacities of the solid coordination compound Cr(C6H4NO2)(3)(s) have been measured by a precision automated adiabatic calorimeter over the temperature range T = 78 K to T = 391 K. The experimental values of the molar heat capacities in the temperature region were fitted to a polynomial equation of heat capacities (C-p,C-m) with the reduced temperatures (X), [X = f(T)], by a least-squares method. The smoothed molar heat capacities and thermodynamic functions of the complex Cr(C6H4NO2)(3)(s) were calculated based on the fitted polynomial. The smoothed values of the molar heat capacities and fundamental thermodynamic functions of the sample relative to the standard reference temperature 298.15 K are tabulated with an interval of 5 K. Enthalpies of dissolution of {3C(6)H(5)NO(2)(s)} [Delta H-d(m)circle minus(1)] and Cr(C6H4NO2)(3)(s) [Delta H-d(m)circle minus(3)] in 100.00 mL of 0.1 mol . dm(-3) HCI and {Cr(OH)(3)(s)} [Delta H-d(m)circle minus(2)] in 100.00 mL of 0.1 mol . dm(-3) HCI solution containing certain amounts of nicotinic acid (named as solution A,) at T = 298.15 K were, respectively, determined to be [(14.44 +/- 0.14), -(34.47 +/- 0.26), and -(25.74 +/- 0.13)] kJ.mol(-1) by means of an isoperibol solution reaction calorimeter. The enthalpy change Delta H-r(m)(5) of the designed solid-state coordination reaction of Cr(OH)(3)(s) with nicotinic acid can be calculated as Delta H-r(m)(5) = (52.04 +/- 0.52) kJ.mol(-1) in accordance with a thermochemical cycle and the experimental results. The standard molar enthalpy of formation of the compound was determined as Delta H-f(m)circle minus[Cr(C6H4NO2)(3), s, 298.15 K] = -(1189.6 +/- 2.8) kJ.mol(-1), from the enthalpies of dissolution and other auxiliary thermodynamic data.
关键词[WOS]: CALORIMETER
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000252292600018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/100387
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.Liaocheng Univ, Coll Chem & Chem Engn, Liaocheng 252059, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China

Recommended Citation:
Di, You-Ying,Yang, Wei-Wei,Kong, Yu-Xia,et al. Low-temperature heat capacities and standard molar enthalpy of formation of chromium nicotinate Cr(C6H4NO2)(3)(s)[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2008,53(1):94-99.
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