Partial molar heat capacities and volumes of transfer of some saccharides from water to aqueous sodium chloride solutions at T=298.15 K

Banipal, P. K. ; Banipal, T. S. ; Ahluwalia, J. C. ; Lark, B. S. (2002) Partial molar heat capacities and volumes of transfer of some saccharides from water to aqueous sodium chloride solutions at T=298.15 K The Journal of Chemical Thermodynamics, 34 (11). pp. 1825-1846. ISSN 0021-9614

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00219...

Related URL: http://dx.doi.org/10.1016/S0021-9614(02)00206-9

Abstract

Partial molar heat capacities (C°p,2,m) and volumes (V°2,m) of seven monosaccharides, namely, D(-)-ribose, D(-)-arabinose, D(+)-xylose, D(+)-glucose, D(+)-mannose, D(+)-galactose, and D(- )-fructose; five disaccharides, namely, sucrose, D(+)-cellobiose, D(+)-maltose monohydrate, D(+)-lactose monohydrate, D(+)-trehalose dihydrate, and one trisaccharide, D(+)-raffinose pentahydrate, have been determined in NaCl(aq), m = (1.0, 2.0, and 3.0) mol·kg-1 at T=298.15 K from volumic heat capacity and density measurements employing a Picker flow microcalorimeter and a vibrating-tube densimeter, respectively. These data were combined with the earlier reported C°p,2,m and V°2,m values in water to calculate the corresponding partial molar properties of transfer (Δtrp,2,m and Δtr2,m) from water to aqueous sodium chloride solutions at infinite dilution. These transfer parameters are positive, and the values increase with the concentration of sodium chloride for all the saccharides. Transfer parameters have been discussed in terms of solute-cosolute interactions on the basis of a cosphere overlap model. Pair and higher-order interaction coefficients have also been calculated from transfer parameters.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Saccharides; Heat Capacity; Volume; Transfer Functions; Interaction Coefficients
ID Code:353
Deposited On:21 Sep 2010 04:46
Last Modified:11 May 2011 06:56

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