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Low-temperature heat capacities and standard molar enthalpy of formation of chromium nicotinate Cr(C6H4NO2)(3)(s)
Di, You-Ying1; Yang, Wei-Wei1; Kong, Yu-Xia1; Shi, Quan2; Tan, Zhi-Cheng2; Di YY(邸友莹)
刊名JOURNAL OF CHEMICAL AND ENGINEERING DATA
2008
DOI10.1021/je7004006
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
关键词[WOS]CALORIMETER
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.
语种英语
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WOS记录号WOS:000252292600018
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/100387
专题中国科学院大连化学物理研究所
通讯作者Di YY(邸友莹)
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
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GB/T 7714
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.
APA Di, You-Ying,Yang, Wei-Wei,Kong, Yu-Xia,Shi, Quan,Tan, Zhi-Cheng,&邸友莹.(2008).Low-temperature heat capacities and standard molar enthalpy of formation of chromium nicotinate Cr(C6H4NO2)(3)(s).JOURNAL OF CHEMICAL AND ENGINEERING DATA,53(1),94-99.
MLA Di, You-Ying,et al."Low-temperature heat capacities and standard molar enthalpy of formation of chromium nicotinate Cr(C6H4NO2)(3)(s)".JOURNAL OF CHEMICAL AND ENGINEERING DATA 53.1(2008):94-99.
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