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Modification of the Two-Point Scaling Theory for the Description of the Phase Transition in Solution. Analysis of Sodium Octanoate Aqueous Solutions.

Piekarski H, Wasiak M, Wojtczak L - J Solution Chem (2012)

Bottom Line: The results obtained indicate that the micellization process is subject to the scaling laws.The results were compared with those for other systems.ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s10953-012-9795-6) contains supplementary material, which is available to authorized users.

View Article: PubMed Central - PubMed

ABSTRACT
On the basis of conventional scaling theory, the two-point scaling theory was modified in order to describe the influence of composition on the partial molar heat capacity and volume during the micellization process. To verify the theory, isobaric heat capacities and densities of aqueous sodium octanoate solutions were measured over wide composition and temperature ranges and the modified approach was used to analyze the calculated partial molar heat capacities and volumes of the surfactant in water. The results obtained indicate that the micellization process is subject to the scaling laws. The results were compared with those for other systems. Peculiar behavior of the critical indices was observed and correlated with the structure of the micelles. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s10953-012-9795-6) contains supplementary material, which is available to authorized users.

No MeSH data available.


Related in: MedlinePlus

Qualitative influence of molality on the partial molar heat capacity and on the partial molar volume according to the two-point scaling theory
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Fig1: Qualitative influence of molality on the partial molar heat capacity and on the partial molar volume according to the two-point scaling theory

Mentions: The shape of the curve for the partial molar heat capacity (and for the partial molar volume) versus molality following from the two-point scaling theory is the same as the shape of the curve for the heat capacity (and magnetization, respectively) versus temperature following from the conventional scaling theory. The graphical representation of the obtained results is showed in Fig. 1. Fig. 1


Modification of the Two-Point Scaling Theory for the Description of the Phase Transition in Solution. Analysis of Sodium Octanoate Aqueous Solutions.

Piekarski H, Wasiak M, Wojtczak L - J Solution Chem (2012)

Qualitative influence of molality on the partial molar heat capacity and on the partial molar volume according to the two-point scaling theory
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3298654&req=5

Fig1: Qualitative influence of molality on the partial molar heat capacity and on the partial molar volume according to the two-point scaling theory
Mentions: The shape of the curve for the partial molar heat capacity (and for the partial molar volume) versus molality following from the two-point scaling theory is the same as the shape of the curve for the heat capacity (and magnetization, respectively) versus temperature following from the conventional scaling theory. The graphical representation of the obtained results is showed in Fig. 1. Fig. 1

Bottom Line: The results obtained indicate that the micellization process is subject to the scaling laws.The results were compared with those for other systems.ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s10953-012-9795-6) contains supplementary material, which is available to authorized users.

View Article: PubMed Central - PubMed

ABSTRACT
On the basis of conventional scaling theory, the two-point scaling theory was modified in order to describe the influence of composition on the partial molar heat capacity and volume during the micellization process. To verify the theory, isobaric heat capacities and densities of aqueous sodium octanoate solutions were measured over wide composition and temperature ranges and the modified approach was used to analyze the calculated partial molar heat capacities and volumes of the surfactant in water. The results obtained indicate that the micellization process is subject to the scaling laws. The results were compared with those for other systems. Peculiar behavior of the critical indices was observed and correlated with the structure of the micelles. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s10953-012-9795-6) contains supplementary material, which is available to authorized users.

No MeSH data available.


Related in: MedlinePlus