화학공학소재연구정보센터
Journal of Chemical Thermodynamics, Vol.41, No.10, 1162-1169, 2009
The (p, rho, T) properties and apparent molar volumes V-phi of (ZnBr2 + C2H5OH)
The (p, rho, T) properties and apparent molar volumes V-phi of ZnBr2 in ethanol at temperatures (293.15 to 393.15) K and pressures up to p = 40 MPa are reported. The measurements were made with a recently developed vibration-tube densimeter. The system was calibrated using double-distilled water, methanol, ethanol, and aqueous NaCl solutions. The experiments were carried out at molalities of m = (0.05681, 0.16958, 0.30426, 0.43835. 0.93055, 1.49016, and 1.88723) mol . kg(-1) using zinc bromide. An empirical correlation for the density of (ZnBr2 + C2H5OH) with pressure, temperature, and molality has been derived. This equation of state was used to calculate other volumetric properties such as isothermal compressibility, isobaric thermal expansibility, the differences in specific heat capacities at constant pressures and volumes, apparent molar volumes of ZnBr2 in ethanol, and partial molar volumes of both components. (C) 2009 Published by Elsevier Ltd.