Low-temperature heat capacities and standard molar enthalpy of formation of chromium nicotinate Cr(C6H4NO2)(3)(s)

	Low-temperature heat capacities and standard molar enthalpy of formation of chromium nicotinate Cr(C6H4NO2)(3)(s)
	Di, You-Ying 1; Yang, Wei-Wei 1; Kong, Yu-Xia 1; Shi, Quan 2; Tan, Zhi-Cheng 2
刊名	journal of chemical and engineering data
	2008
卷号	53 期号:1 页码:94-99
通讯作者	邸友莹
产权排序	2;4
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.
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
收录类别	SCI
原文出处	true
语种	英语
WOS记录号	WOS:000252292600018
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/100387]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
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
推荐引用方式 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.(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.