Study of the System Nitrobenzene/Isooctane in the Vicinity of its Critical Point: Static and Dynamic Light Scattering and Reevaluation of Ultrasonic Absorption Data

Autor:	F. P. Harnisch, Silvia Kölchens, D. Woermann, L. Belkoura, Th. Müller‐Kirschbaum
Rok vydání:	1987
Předmět:	Coupling constant business.industry General Chemical Engineering Critical phenomena Ultrasound Analytical chemistry Light scattering Nitrobenzene chemistry.chemical_compound Dynamic light scattering chemistry Critical point (thermodynamics) Data analysis business
Zdroj:	Berichte der Bunsengesellschaft für physikalische Chemie. 91:1036-1043
ISSN:	0005-9021
DOI:	10.1002/bbpc.19870911012
Popis:	Static and dynamic light scattering measurements with nitrobenzene/isooctane mixtures of critical composition in combination with measurements of temperature dependence of specific heat and density are used to obtain values of parameters appearing in the Ferrell-Bhattacharjee theory of ultrasound absorption of binary critical mixtures (σ0: characteristic temperature independent relaxation rate, ω0 = (43.8 ± 0.7) GHz; g: coupling constant, g = – (0.56 ± 0.01). Recent ultrasound absorption data of that system are reanalysed on the basis of Ferrell-Bhattacharjee theory. The analysis of data measured at seven frequencies of ultrasound in the range 9 MHz to 45 MHz gives values of the parameters ω0 and g which are in satisfactory agreement with those obtained from light scattering and thermodynamic measurements (ω0 = (37 σ 3) GHz; lgl = 0.5).
Databáze:	OpenAIRE
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