Densities and Molar Volumes of Aqueous Solutions of Li2SO4 at Temperatures from 343 to 573 K

doi:10.1021/acs.jced.7b00570

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	Densities and Molar Volumes of Aqueous Solutions of Li2SO4 at Temperatures from 343 to 573 K
	Hnedkovsky, Lubomir; Hu, Bin; Hefter, Glenn
第一作者	Hnedkovsky, Lubomir
	2017-10
发表期刊	JOURNAL OF CHEMICAL AND ENGINEERING DATA
ISSN	0021-9568
卷号	62 期号:10 页码:3593-3602
摘要	Densities of aqueous solutions of lithium sulfate (Li2SO4) at solute molalities ranging from 0.05 to 2.7 mol.kg(-1) have been measured by vibrating-tube densimetry over the temperature range 373.15 <= T/K <= 573.15 at pressures close to the saturated vapor pressure of pure water. The apparent molar volumes (V-phi) of Li2SO4(aq) calculated from these data together with previously published data at 323.15 and 343.15 K were fitted using a modified Redlich-Rosenfeld-Meyer equation, which in turn was used to extrapolate the experimental data to infinite dilution to obtain the standard partial molar volumes. A comparison of the present and literature data revealed the latter are inaccurate at low concentrations and are increasingly unreliable at higher temperatures. The combination of the present results with selected literature data produced a reliable equation of state for Li2SO4(aq) covering the temperature and pressure ranges 323.15 <= T/K <= 573.15 and 0.1 <= p/MPa <= 40. The volumetric behavior of Li2SO4(aq) was found to differ dramatically from that of Na2SO4(aq) and K2SO4(aq), especially at higher temperatures, higher concentrations, and lower pressures, reflecting the exceptional character of lithium ion hydration. Isobaric expansibilities indicated that Li2SO4(aq) remains a water structure maker over the investigated conditions.
DOI	10.1021/acs.jced.7b00570
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/6272
专题	青海盐湖研究所知识仓储盐湖资源与化学实验室
推荐引用方式 GB/T 7714	Hnedkovsky, Lubomir,Hu, Bin,Hefter, Glenn. Densities and Molar Volumes of Aqueous Solutions of Li2SO4 at Temperatures from 343 to 573 K[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2017,62(10):3593-3602.
APA	Hnedkovsky, Lubomir,Hu, Bin,&Hefter, Glenn.(2017).Densities and Molar Volumes of Aqueous Solutions of Li2SO4 at Temperatures from 343 to 573 K.JOURNAL OF CHEMICAL AND ENGINEERING DATA,62(10),3593-3602.
MLA	Hnedkovsky, Lubomir,et al."Densities and Molar Volumes of Aqueous Solutions of Li2SO4 at Temperatures from 343 to 573 K".JOURNAL OF CHEMICAL AND ENGINEERING DATA 62.10(2017):3593-3602.

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