The Eighth Palestinian International Chemistry Conference (PICC 2015) "Chemical Sciences Towards Knowledge Based Economy" At An Najah University, Nablus, Palestine

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Research Title: 
Critical Behavior of the Ultrasonic Attenuation for the Binary Mixture of Water – Phenol
Maryam Reehan
Issam Ashqer
Mohammed Abu-Jafar
Wed, 2015-04-22
Research Abstract: 
The dynamic shear viscosity of the binary liquid mixture water – phenol was measured for different temperatures and concentrations using the glass capillary and digital viscometers. Dynamic shear viscosity anomaly was detected near the critical temperature T_(c )= 67 °C and the critical concentration x_c= 33.9% by weight of phenol. The specific heat at constant pressure was calculated using the two scale factor universality and found to be 241.9 J/(kg K). The critical and the background isobaric thermal expansion coefficients were determined and found to be 2.729 x10-3 °Cˉ¹ and 22.59 x10-3 °Cˉ¹ respectively. Ultrasonic attenuation data at 9, 15, 30 and 35 MHz were analyzed using the dynamic scaling theory of Ferrell and Bhattacharjee. The values of α_c/f^2 versus f^(ˉ¹˙⁰⁶) yield a straight line as predicted by the theory. The experimental values of α(x_c,T)/(α_c (x_c,T_c)) for water – phenol were compared to the scaling function F(ω*') and showed good agreement with the theory.