Enthalpies of Solution for VOSO(4)center dot 2.76H(2)O(s) in Water and in Aqueous H(2)SO(4)

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	Enthalpies of Solution for VOSO(4)center dot 2.76H(2)O(s) in Water and in Aqueous H(2)SO(4)
	J. G. Liu; Y. Qin; C. W. Yan
	2010
发表期刊	Acta Chimica Sinica
ISSN	0567-7351
卷号	68 期号:7 页码:722-726
摘要	The molal enthalpies of solution of VOSO(4)center dot 2.76H(2)O(s) with various molalities in water and in aqueous sulfuric acid (0.5 mol.kg(-1)) Delta(s)H(m), were measured by a solution-reaction isoperibol calorimeter at 298.15 K. The value of -Delta(s)H(m) in aqueous sulfuric acid was lower than that in water, which shows that energy state of VOSO(4) in aqueous H(2)SO(4) was higher than that in pure water. An improved Archer's method was put forward in terms of ionic association equilibrium of VOSO(4) and second dissociation equilibrium of H(2)SO(4). Using the improved method, the standard molal enthalpies of solution Delta(s)H(m)(circle minus) = 29.18 kJ.mol(-1) in pure water and Delta(s)H(m)(circle minus) = -25.79 kJ.mol(-1) in aqueous sulfuric acid were obtained, respectively. According to calculation, the molality of VO(2+) was larger in VOSO(4)-H(2)SO(4) mixed solution than that in water.
部门归属	[liu jianguo; qin ye; yan chuanwei] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;liu, jg (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china;cwyan@imr.ac.cn
关键词	Vanadium Redox Flow Battery Enthalpy Of Solution Vanadyl Sulfate Sulfuric Acid Vanadyl Sulfate Sulfuric-acid Redox v(Iv)/v(v) Battery Cell
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31294
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. G. Liu,Y. Qin,C. W. Yan. Enthalpies of Solution for VOSO(4)center dot 2.76H(2)O(s) in Water and in Aqueous H(2)SO(4)[J]. Acta Chimica Sinica,2010,68(7):722-726.
APA	J. G. Liu,Y. Qin,&C. W. Yan.(2010).Enthalpies of Solution for VOSO(4)center dot 2.76H(2)O(s) in Water and in Aqueous H(2)SO(4).Acta Chimica Sinica,68(7),722-726.
MLA	J. G. Liu,et al."Enthalpies of Solution for VOSO(4)center dot 2.76H(2)O(s) in Water and in Aqueous H(2)SO(4)".Acta Chimica Sinica 68.7(2010):722-726.