Issue 21, 1995

Ultrasonic absorption of nitrobenzene–isooctane mixtures of non-critical composition

Abstract

The dynamic scaling theory of Ferrell and Bhattacharjee (Phys. Rev. A, 1985, 31, 1788) has been used to analyse ultrasonic absorption data of two nitrobenzene–isooctane mixtures of non-critical composition. The measurements were carried out as a function of temperature [1 ⩽(TTp)/K ⩽ 20; Tp, temperature of phase separation] and frequency (3 ⩽f/MHz ⩽ 57). The data describing the temperature- and frequency-dependent contributions of composition fluctuations to the ultrasonic absorption follow a single curve. The data can be represented by a modified dynamic scaling function similar to that proposed by Ferrell and Bhattacharjee to describe the ultrasonic absorption of a mixture of critical composition. The temperature dependence of the scaling variable Ωnc for the mixtures of non-critical compostion is calculated by replacing the critical temperature Tc by an empirical pseudospinodal temperature Tps or the temperature of phase separation Tp of the mixture of non-critical composition. The frequency- and temperature-independent parameter ω0, nc of the scaling variable Ωnc is used as the only free parameter of the fit of the scaling function F(Ωnc) to the experimental data. The value of ω0 is found to be composition dependent.

Article information

Article type
Paper

J. Chem. Soc., Faraday Trans., 1995,91, 3889-3892

Ultrasonic absorption of nitrobenzene–isooctane mixtures of non-critical composition

A. Zielesny and D. Woermann, J. Chem. Soc., Faraday Trans., 1995, 91, 3889 DOI: 10.1039/FT9959103889

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements