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Heat capacities of concentrated aqueous alkaline aluminate solutions at 25°C
Journal article   Peer reviewed

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

M.C.F. Magalhães, E. Königsberger, P.M. May and G. Hefter
Journal of Chemical and Engineering Data, Vol.47(4), pp.960-963
2002
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Abstract

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 Al(OH)4- have been measured at 25°C using a Picker flow calorimeter. The mean apparent molar heat capacities (Cpφ) of the NaOH/NaAl(OH)4 mixtures were linear with respect to Al(OH)4- substitution, consistent with Young's rule. This enabled Cpφ 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.

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Citation topics
2 Chemistry
2.89 Ionic, Molecular & Complex Liquids
2.89.462 Excess Molar Volumes
Web Of Science research areas
Chemistry, Multidisciplinary
Engineering, Chemical
Thermodynamics
ESI research areas
Chemistry
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