Heat capacities and thermodynamic functions of the aqueous Li2B4O7 solution in the temperature range from 80 K to 355 K

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 青海盐湖研究所知识仓储

	Heat capacities and thermodynamic functions of the aqueous Li2B4O7 solution in the temperature range from 80 K to 355 K
	Zhang, Zhi-Heng ; Tan, Zhi-Cheng ; Yin, Guo-Yin ; Yao, Yan ; Sun, Li-Xian ; Li, Yan-Sheng
刊名	JOURNAL OF CHEMICAL AND ENGINEERING DATA
	2007-05-01
卷号	52 期号:3 页码:866-870
文献子类	Article
英文摘要	The molar heat capacities of the aqueous Li2B4O7 solution at the concentration of 0.0187 mol.kg(-1) have been measured using a precision automated adiabatic calorimeter in the temperature range from 80 K to 355 K. The dependence of the molar heat capacity on temperature was given as a function of the reduced temperature X by polynomial equations C-p,C-m (J.K-1.mol(-1)) = 25.44 + 11.99X + 0.454X(2) + 1.671X(3) for the solid phase [80 K similar to 258 K, X = (T - 169)/89] and C-p,C-m (J.K-1.mol(-1)) = 77.33 for the liquid phase [274 K similar to 355 K], respectively. The phase transition of the solution was determined on the basis of the curve of the heat capacity with temperature. The temperature of the phase transition was observed at 273.04 K, and the enthalpy and entropy of the phase transition were calculated to be Delta H-m = 4.650 kJ.mol(-1) and Delta S-m = 17.03 J.K-1.mol(-1), respectively. According to the polynomial equations and thermodynamic relationship, the values of the thermodynamic function of the aqueous Li2B4O7 solution relative to 298.15 K were calculated in the temperature range from 80 K to 355 K with an interval of 5 K. The relative apparent molar heat capacities of the aqueous Li2B4O7 solution, C-p,C-phi, were calculated every 5 K in the temperature range from 80 K to 355 K from the experimental heat capacities of the aqueous Li2B4O7 solution and the heat capacities of pure water.
WOS关键词	THERMOCHEMISTRY ; REPRESENTATION ; CALORIMETER ; CHLORIDE ; MODEL
WOS研究方向	Chemistry ; Engineering
语种	英语
WOS记录号	WOS:000246372100036
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/5801]
专题	青海盐湖研究所_青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China 3.Dalian Jiaotong Univ, Coll Environm Sci & Engn, Dalian 116028, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhi-Heng,Tan, Zhi-Cheng,Yin, Guo-Yin,et al. Heat capacities and thermodynamic functions of the aqueous Li2B4O7 solution in the temperature range from 80 K to 355 K[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2007,52(3):866-870.
APA	Zhang, Zhi-Heng,Tan, Zhi-Cheng,Yin, Guo-Yin,Yao, Yan,Sun, Li-Xian,&Li, Yan-Sheng.(2007).Heat capacities and thermodynamic functions of the aqueous Li2B4O7 solution in the temperature range from 80 K to 355 K.JOURNAL OF CHEMICAL AND ENGINEERING DATA,52(3),866-870.
MLA	Zhang, Zhi-Heng,et al."Heat capacities and thermodynamic functions of the aqueous Li2B4O7 solution in the temperature range from 80 K to 355 K".JOURNAL OF CHEMICAL AND ENGINEERING DATA 52.3(2007):866-870.