A viscosity model, based on Eyring’s absolute rate theory combined with a cubic PR equation of state and Wong-Sandler mixing rule, has been proposed in order to correlate viscosities of aqueous solutions of alkanolamine mixtures at atmospheric pressure and different temperatures. In the proposed method, the energy and size parameters in studied Equation of State (EoS) have been obtained usi...

The extension of the translated–consistent Peng–Robinson (tc-PR) equation state (EoS) to mixtures has been investigated. For this purpose, advanced EoS/aresE,γ mixing rules are used combine tc-PR EoS with residual part an activity coefficient model chosen among Wilson, nonrandom two-liquid (NRTL), and universal quasi-chemical (UNIQUAC) models. performances three resulting versions compared agai...

the density and viscosity values at t= (293.15 to 323.15) k for binary mixtures of nitromethane with 2-propanol, 2-butanol and 2-pentanol were measured over the entire composition range. from the experimental data, excess molar volumes, thermal expansion coefficients, excess thermal expansions, partial molar volumes at infinite dilution and deviations in viscosity were calculated. the results w...

The extension of the translated–consistent Peng–Robinson (tc-PR) equation state (EoS) to mixtures has been investigated. For this purpose, advanced EoS/aresE,? mixing rules are used combine tc-PR EoS with residual part an activity coefficient model chosen among Wilson, nonrandom two-liquid (NRTL), and universal quasi-chemical (UNIQUAC) models. performances three resulting versions compared agai...

calculate some thermodynamic properties of molten polymers including specific volume and isothermal compressibility (s.m. hoseini, physical chemistry & electrochemistry, 2 (2014) 56-65). this work extended that eos to predict the volumetric properties of some molten ethylene copolymers including ethylene/1-octene, ethylene/1-butene (xethylene equal to 0.8543 and 0.563), ethylene/propene. the ab...

in this study, a temperature-dependent of the dispersion coefficients is calculated from equation state.the lennard-jones lj (12-6-3) effective pair potential function and simple thermodynamic argumentwith the input pvt data of liquid metals are used to calculate the dispersion coefficients. the dispersioncoefficients ( , , ) 3 6 12 c c c are found to be a linear function of 1/t1+α , where t is...

This work studies two binary mixtures of R1243zf + R1234yf and R245cb which can be possibly used as a long-term alternative refrigerant for heat pumps. We present critical property (critical temperature, pressure, density) vapor liquid equilibrium (VLE) binaries. The maximum extended uncertainties (k=2) are estimated U(T) = 0.21 K, U(p) 0.048 MPa, U(ρ) 6.4 kg/m3 measurement, 0.06 K 0.015 MPa bu...