Speed of Sound and Excess Properties of (Ethanol + Isooctane) Binary System

Abstract

We report the speeds of sound for the mixtures of ethanol (1) + isooctane (2) at 0.100, 0.300, 0.500, 0.700, 0.900 molar fractions of ethanol, respectively, at temperatures from 298.15 to 605.23 K along three isobaric lines from 3.0 to 7.0 MPa. On the basis of the experimental results and the literature density data, we evaluate the excess free length, excess acoustic impedance, and excess isothermal compressibility of ethanol (1) + isooctane (2) mixtures at 298.15 to 435.15 K and pressures below 5.0 MPa. Moreover, we fit the excess values by the Redlich–Kister polynomial equation. Finally, molecular interactions between ethanol and isooctane are analyzed.

Thermodynamic Properties of 1-Butanol + Ethyl Laurate Binary Mixtures by Combining Experimental Speeds of Sound with Volume Translated Peng–Robinson Equation of State

“…The Brillouin frequency shift can be accurately measured by using a Fabry–Perot interferometer (FPI) that has a FSR of 1.5 GHz. The detailed equipment information used in the system, as demonstrated in Figure S4 has been introduced in our earlier papers. ,, In the Supporting Information, Figure S5 shows the schematics of the temperature and pressure control system.…”

“…The detailed equipment information used in the system, as demonstrated in Figure S4 has been introduced in our earlier papers. 39,45,53 In the Supporting Information, Figure S5 shows the schematics of the temperature and pressure control system.…”