Heat capacities of concentrated aqueous alkaline aluminate solutions at 25 °C

被引：14

作者：

Magalhaes, MCF ^{[1
]}

Königsberger, E ^{[1
]}

May, PM ^{[1
]}

Hefter, G ^{[1
]}

机构：

[1] Murdoch Univ, DOSE, Murdoch, WA 6150, Australia

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2002年 / 47卷 / 04期

关键词：

D O I：

10.1021/je020003m

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Heat capacities of aqueous NaOH/NaAl(OH)(4) solutions at total stoichiometric ionic strengths of up to 6 mol kg(-1) and with up to 60 mol % substitution of OH- by AI(OH)(4)(-) have been measured at 25 degreesC using a Picker flow calorimeter. The mean apparent molar heat capacities (CN) of the NaOH/NaAl(OH)(4) mixtures were linear with respect to Al(OH)(4)(-) substitution, consistent with Young's rule. This enabled C, values to be derived for the hypothetical pure NaAl(OH)(4)(aq) solutions. The results so obtained are well described by a Pitzer model adapted from the literature, even up to high concentrations.

引用

页码：960 / 963

页数：4

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