Excess volumes and isentropic compressibilities of 2,5,8-trioxanonane-n-heptane mixtures

Abstract

Measurements of excess volume and ultrasonic speed were carried out for mixtures of 2,5,8-trioxanonane ((CH,0CH2CH2)20) with n-heptane at 298.15 K over the entire mole fraction range Including the region of high dilution of the ether. From these results, Isentropic compressibilities, excess Isentropic compressibilities, partial molar excess volumes, and partial molar excess Isentropic compressibilities were calculated. A qualitative discussion of the results Is presented.

Glymes as versatile solvents for chemical reactions and processes: from the laboratory to industry

“…Other experimental or theoretic studies of physical properties of glymes or glyme-containing mixtures can be found in literatures: optical anisotropies of monoglyme, diglyme, triglyme and tetraglyme, 82 excess heat capacities of liquid mixtures of triglyme and tetraglyme with cyclohexane as well as tetraglyme with n -heptane at 288.15, 298.15 and 308.15 K and at atmospheric pressure, 83 weak self-association of glymes based on the evaluation of excess isobaric thermal expansion of glyme and alkane mixtures by an associated mixture model with equation of state contribution, 84 excess molar volumes and excess molar isobaric heat capacities of glymes and ethyl acetate, 44 excess molar volumes and viscosities of glyme and acetonitrile, 85 excess thermodynamic and equilibrium properties of glyme + n -alkane mixtures, 45, 65, 66, 71, 81 isobaric vapor-liquid equilibrium for the binary systems of monoglyme + alcohols, 53 excess molar volumes of binary mixtures of glymes and 1-propanol, 59, 60, 63 calorimetric study of interactions between glyme and alcohol, 61 dynamic viscosities of mixtures of refrigerant (HFC-134a) + glyme at different temperatures and pressures, 86 excess molar enthalpies of mixtures of methanol or trifluoroethanol + glyme, 87, 88 static relative permittivities of the ternary system of 2-methoxyethanol + 1,2-dimethoxyethane + water from −10–80 °C, 78 vapor-liquid equilibrium of binary systems consisting of monoglyme with toluene, methylcyclohexane, or (trifluoromethyl)benzene, 69 solubility of HFC-134a refrigerant in glymes, 89 densities, viscosities, and refractive indices of diglyme + cyclohexane or + 1,2,3,4-tetrahydronaphthalene, 70 excess molar heat capacities of mixtures of glymes and various alkanes, 79 and excess heat capacities of glyme-dimethylsiloxane systems at 25 °C, 90 etc. López et al 91 estimated the densities, isothermal compressibilities, and isobaric thermal expansion coefficients of glymes in the temperature range of 293.15K–353.15K at pressures up to 100 MPa from the P-c-T data ( c is the speed of sound in glyme), and found the indirect predictions matched direct experimental values.…”

“…), l Ref, 46 m Ref, 47 n Ref, 48 o Ref 49 (densities and viscosities of monoglyme at 308.15 K and 318.15 K were also reported), p Ref, 50 q Ref, 51 r Ref 52 (this reference also reported dielectric constant of 7.62 as well as refractive index and molar refraction for triglyme), s Ref, 53 t Ref 54 , u Ref, 55 v density data for monoglyme and diglyme were reported at temperatures between 293.15 K and 353.15 K and up to 60 MPa, 56 w Ref, 57 x Ref, 58 y Ref 59 (density data at 288.18 and 308.15 K were also reported), z Ref, 60 aa Ref, 61 bb Ref 62 (densities and viscosities were reported for several glymes from 288.15 K to 343.15 K), cc Ref, 63 dd Ref, 64 ee Ref, 65 ff Ref, 66 gg Ref 67 (densities, kinematic viscosities and heat capacities were reported for several glymes including pentaethylene glycol dimethyl ether from 283.15 to 423.15 K), hh Ref 68 (data on density, isentropic compressibility and isothermal compressibility of triglyme and tetraglyme were reported at 293.15–353.15 K and 0.1–100 MPa), ii Ref, 69 jj Ref, 70 kk Ref, 71 ll Ref, 72 mm Ref (densities, refractive indexes, and boiling points of other 1,2-disubstituted ethylene glycol derivatives such as propyl glyme were also reported), 73 nn Ref, 74 …”

Excess enthalpies for binary mixtures of 2,5,8-trioxanonane or 2,5,8,11,14-pentaoxapentadecane with n-alkanes at 298.15 K

“…Reaction products from ammonium halides and liquid ammonia are referred as ammine complexes or ammoniated salts. Recently, these complexes in the liquid phase have been utilized as a working system for chemical energy storage and chemical heat pumps (7,2,3). Ammonium bromide + ammonia and ammonium iodide + ammonia solutions were valuable as the working system (4).…”

Speeds of Sound and Isentropic Compressibilities of Diethylene Glycol Dimethyl Ether - n-Alcohol Mixtures at 298.15 K

“…The deviations of the speeds of sound from their values in an ideal mixture were calculated from u D ϭ u Ϫ u id (6) where [19,20]:…”