Journal
CHEMICAL PHYSICS LETTERS
Volume 543, Issue -, Pages 68-71Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2012.06.009
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Funding
- Japan Society for the Promotion of Science [18750006]
- Grants-in-Aid for Scientific Research [18750006, 21245003] Funding Source: KAKEN
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Fluctuation terms of the supercritical aqueous solutions of n-pentane, i.e., those of densities, concentrations, and their correlation terms, were evaluated by small-angle X-ray scattering intensity in combination with isothermal compressibility and partial molar volumes. The fluctuations increased significantly with the fluid density up to the region of middle density, similar to 0.2 g cm(-3), and then decreased at higher density. In the region where the fluctuations took maxima or minima, the density was lower than those of water critical density. The particle-number fluctuations of individual components obtained from the fluctuation terms show that water molecules are distributed more inhomogeneously than n-pentane, especially in the region of similar to 0.3 g cm(-3). (C) 2012 Elsevier B.V. All rights reserved.
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