✦ LIBER ✦

Fluctuations in aqueous solutions of some hydrophobic solutes

✍ Scribed by Yoshikata Koga

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 282 KB
Volume: 240
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(95)00531-8

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✦ Synopsis

The entropy fluctuation in liquids and solutions is most conveniently normalized to the coarse-grained volume. Hence, ((AS~V) 2 ) = RCp/V 2 and <(aS/V×aN/N)> = Rr~p/Vm. It was shown to be useful if the response functions, Cp, K r and ap, and the fluctuations derived from them, were discussed separately in contrasting the peculiar nature of liquid H20 against a typical van der Waals liquid, benzene. The composition dependence of these fluctuations was examined in aqueous solutions of typical hydrophobic solutes, 2-butoxyethanol, 2-butanone and tert-butanol. It was concluded that the above solutes reduce the hydrogen bond probability in H20 up to the crossover point of mixing scheme, x~.

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