Non-linearity parameter B/A of binary liquid mixtures at elevated pressures

Abstract

When sound waves of high amplitude propagate, several non-linear effects occur. Ultrasonic studies in liquid mixtures provide valuable information about structure and interaction in such systems. The present investigation comprises of theoretical evaluation of the acoustic non-linearity parameter of four binary liquid mixtures using Tong and Dong equation at high pressures and Ì ¿¼¿ ½ K. Thermodynamic method has also been used to calculate the non-linearity parameter after making certain approximations.

Studies on thermodynamic properties of binary mixtures of hexan-1-ol with halogenated compounds at T=(308.15 and 313.15)K

“…where c = C P /C V is the ratio of isobaric and isochoric heat capacities that can be obtained from the isentropic and isothermal compressibility coefficients j S and j T using the thermodynamic relation j T /j S = C P /C V .Beyer's parameters of nonlinearity (B/A) [28][29][30][31], which determine the hardness of liquids, were calculated from the relation…”

“…The curves for the variation of Beyer's non-linearity parameter B/A with mole fraction x 1 for the systems under investigation are displayed in figure 6 at T = (308.15 and 313.15) K. The non-linearity parameter B/A which determines the hardness of a liquid [28][29][30][31] varies in the order: DBE > TCE > HEX > DCE. For the binary liquid mixture (1,2-DCE + hexan-1-ol), the B/A values decrease with the increase in the mole fraction of 1,2-DCE up to x 1 % 0.8 indicating that the hardness of the liquid decreases with the increase in the concentration of 1,2-DCE.…”

Thermophysical and sonochemical behaviour of binary mixtures of decan-1-ol with halohydrocarbons at (T=293.15 and 313.15)K

“…The molar free volumes, V f , were obtained according to Eyring from the relation [34][35][36][37][38] Parameters related to space-filling ability V f /V, available volumes, V a , intermolecular free lengths, L f , and molecular radii, r for {halohydrocarbons (1) + decan-1-ol (2)}. …”

Isotopic effects on non-linearity, molecular radius and intermolecular free length

“…In the present investigation, computation of three parameters, viz., non-linearity parameter (B/A), molecular radius (r m ) and intermolecular free length (L f ) for H 2 O, C 6 H 6 , C 6 H 12 , CH 3 OH, C 2 H 5 OH and their corresponding deuterium-substituted compounds have been made at four different temperatures, viz., 293.15, 303.15, 313.15 and 323.15 K. The values of ultrasonic velocity, density and adiabatic compressibility of the hydrogen compounds and their corresponding deuterium compounds have been taken from [3]. All the aforementioned parameters which have been computed are represented in table 1.…”

“…In our previous investigation [2], computation of isothermal compressibility (β T ), coefficient of thermal expansion (α), Grüneisen parameter (Γ), internal pressure (P i ) and surface tension (σ) for H 2 O, C 6 H 6 , C 6 H 12 , CH 3 OH, C 2 H 5 OH and their deuterium-substituted compounds were carried out at four different temperatures, viz., 293.15, 303.15, 313.15 and 323.15 K respectively. A recent revival in the interest regarding the study of non-linearity parameter (B/A) [3,4], molecular radius (r m ) [5] and intermolecular free length (L f ) [6][7][8] has prompted us to extend [2] our ongoing investigation for the aforementioned compounds.…”