Ultrasonic velocity and absorption as a function of temperature, concentration, and frequency (5–25 MHz) and shear viscosity as a function of concentration and temperature are reported for the binary mixture nitrobenzene‐n‐hexane in the homogeneous phase above T _c . For the observed absorption at critical concentration and critical temperature α _c /f ² vs f ^−1.06 yields a straight line as predicted by the dynamic scaling theory of Ferrell and Bhattacharjee [Phys. Rev. A 2 4, 1643 (1981)]. Also, the critical amplitudes of the thermal expansion and specific heat have been calculated using the two‐scale factor universality relation. The adiabatic coupling constant g is calculated and compared to the experimental value. In addition, the experimental values of α/α _c (where α is the absorption at critical concentration above the critical temperature) for nitrobenzene‐n‐hexane are compared to the scaling function F(ω*) and show a good agreement with the theory. Finally, the velocity for the system at the critical concentration above the critical temperature appears to decrease linearly with increasing temperature.

Title

J. Acoust. Soc. Am. 88, 1831

Publisher

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Publisher Country

Palestine

Publication Type

Both (Printed and Online)

Volume

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Year

1990

Pages

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