Intermolecular interactions in mixtures of ethyl formate with methanol, ethanol, and 1-propanol on density, viscosity, and ultrasonic data

Abstract

Density (ρ), viscosity (η), and ultrasonic velocity (U) have been measured for binary mixtures of ethyl formate with methanol, ethanol, and 1 propanol at 303 K. From the experimental data, adiabatic com pressibility (β), acoustic impedance (Z), viscous relaxation time (τ), free length (L f ), free volume (V f ), inter nal pressure (π i ), and Gibbs free energy (ΔG) have been deduced. It is shown that strength of intermolecular interactions between ethyl formate with selected 1 alcohols were in the order of methanol < ethanol < 1 pro panol.

Speed of Sound and Derivative Properties of Ethyl Laurate from Rayleigh–Brillouin Light-Scattering Spectroscopy

“…The absolute AAD between the intermolecular free lengths calculated by the modified Jacobson's model and the results in literature 45,69−75 is 0.38% (MD = 1.89%). The agreements of the intermolecular free lengths calculated by the modified Jacobson's model and those data reported in the literature 45,69 are 0.07% for ethyl formate and 1.89% for methyl acetate. The intermolecular free lengths of ethyl acetate obtained by Jacobson et al, 45 Nikam et al, 70 Shukla et al, 71 Saravanakumar et al, 72 Nayeem et al, 73 and Dhaduk et al 74 deviate from the intermolecular free lengths calculated by our modified Jacobson's model by 1.34, 0.39, 0.39, 0.21, 0.15, and 0.19%, respectively.…”

“…Moreover, the RDs between the intermolecular free length ( L f,mod ) calculated by the modified Jacobson’s model and those in the literature ( L f,lit ) are shown in Figure . The absolute AAD between the intermolecular free lengths calculated by the modified Jacobson’s model and the results in literature ,− is 0.38% (MD = 1.89%). The agreements of the intermolecular free lengths calculated by the modified Jacobson’s model and those data reported in the literature , are 0.07% for ethyl formate and 1.89% for methyl acetate.…”

“…Figure 10. Comparison of intermolecular free length between our calculated results from the modified Jacobson's model and the literature values for several saturated fatty acid esters as a function of temperature: pink triangle left-pointing right solid, Elangovan et al69 for ethyl formate; mustard circle top solid Jacobson et al45 for methyl acetate; pink square right solid, Jacobson et al45 for ethyl acetate; mustard triangle left-pointing top solid, Nikam et al70 for ethyl acetate; yellow circle right solid, Divya et al71 for ethyl acetate; green triangle top solid, Saravanakumar et al72 for ethyl acetate; blue pentagon right solid, Nayeem et al73 for ethyl acetate; grape purple hexagon top solid, Dhaduk et al74 for ethyl acetate; and yellow triangle right solid, Ramesh et al75 for ethyl butyrate.…”

“…The Brillouin frequency shift is found to be valid for determining the variation of the relationship between thermophysical properties and temperature for liquid ethyl laurate, and the turning point temperature is estimated to be lower than 442.54 K at pressures up to 10.0 MPa. The experimental speeds of sound in ethyl laurate were fitted by a 69 for ethyl formate; mustard circle top solid Jacobson et al 45 for methyl acetate; pink square right solid, Jacobson et al 45 for ethyl acetate; mustard triangle left-pointing top solid, Nikam et al 70 for ethyl acetate; yellow circle right solid, Divya et al 71 for ethyl acetate; green triangle top solid, Saravanakumar et al 72 for ethyl acetate; blue pentagon right solid, Nayeem et al 73 for ethyl acetate; grape purple hexagon top solid, Dhaduk et al 74 for ethyl acetate; and yellow triangle right solid, Ramesh et al 75 for ethyl butyrate. rational equation, yielding an absolute AAD of 0.37%.…”