Sound Speeds and Excess Isentropic Compressibilities of Ternary Mixtures of Tetrahydropyran and Aromatic Hydrocarbons at 308.15 K

Abstract

Speeds of sound, u i jk , of tetrahydropyran (THP) (i) + benzene ( j) + toluene or o-or p-xylene (k), and tetrahydropyran (i) + toluene ( j) + o-or p-xylene (k) ternary mixtures have been measured over the entire mole fraction range at 308.15 K and atmospheric pressure. The speed-of-sound data have been used to calculate isentropic compressibilities, (κ S ) i jk , and excess isentropic compressibilities,jk values for the investigated mixtures are correlated with the RedlichKister equation to estimate ternary adjustable parameters and standard deviations. The Moelwyn-Huggins concept (Huggins, Polymer 12:357, 1971) of interaction between the surfaces of components of binary mixtures has been extended to predict excess isentropic compressibilities of ternary mixtures by employing the concept of connectivity parameters of the third degree of a molecule (which in turn depends on its topology). It has been observed that (κ S ) i jk values predicted by the MoelwynHuggins concept compare well with corresponding experimental values.

Thermodynamic Properties of Binary Mixtures of Tetrahydropyran with Anilines at 308.15 K

“…5 The purities of the purified liquids were checked by measuring their densities [recorded in Table 1] using a bicapillary pycnometer at (298.15 ( 0.01) K, and these agreed to within ( 0.05 kg • m -3 with their literature values. 4,5 Apparatus and Procedure. Excess molar volumes, V E , excess molar enthalpies, H E , and speeds of sound, u, were determined by a dilatometer, 2-drop calorimeter, and interferometer, respectively, in the manner described elsewhere.…”

“…Thermodynamic properties of liquid mixtures like excess molar volumes, V E , excess molar enthalpies, H E , isentropic compressibility changes of mixing, κ S E , and excess Gibb's free energy, G E , have extensive applications in chemical engineering, design calculations for heat transfer, mass transfer and fluid flow, 1 process simulation, solution theory, and molecular dynamics. In recent studies, [2][3][4] topology of the constituents of binary or ternary mixtures has been employed to predict excess molar volumes, excess molar enthalpies, and isentropic compressibility changes of mixing of binary liquid mixtures. An attempt has been made here to predict excess Gibb's free energy of binary mixtures by employing the topology of a molecule.…”

Thermodynamic Properties of Ternary Liquid Mixtures Containing o-Chlorotoluene: Excess Molar Volumes and Excess Isentropic Compressibilities

“…o -Chlorotoluene ( o -CT; Fluka, mass fraction, 0.993; GC), tetrahydropyran (THP; Fluka, mass fraction, 0.995; GC), benzene (Fluka, mass fraction, 0.996; GC), toluene (Fluka, mass fraction, 0.995; GC), and o -xylene (Fluka, mass fraction, 0.997; GC) were purified by standard methods. − The source of chemicals, CAS Registry Number, molar weight, purification method, final purity, and analysis method for purity are collected in Table . The densities and speed of sound values of the purified liquids compared with the literature ,− data are reported in Table .…”

“… a Ref . b Ref . c Ref . d Ref . e Ref . f Ref . g Ref . h Ref . i Ref . j Ref . k Ref . l Ref . m Ref . n Ref . o Ref . p Ref . q Ref . r Ref . s Ref . t Ref . u Ref . v Ref . Standard uncertainties u are u­( T ) = 0.01 K, u­(ρ) = 0.5 kg·m –3 , and u­( u ) = 0.1 m·s –1 . …”

Excess Heat Capacities of Binary Mixtures Containing o-Chlorotoluene and Pyridine or Isomeric Picolines or Aromatic Hydrocarbons

“…[13,14]. The densities, q and speeds of sound, u values of the purified liquids (measured by using a density and sound analyzer, Anton Paar DSA 5000) are listed in Table 1 [13][14][15][16][17][18][19][20][21][22][23][24]. The density and speed of sound values of the pure liquids were measured in the manner as described elsewhere [25,26].…”