Excess enthalpies of binary mixtures {xdioxane isomer+(1−x)non-polar liquid} at 298.15 K

Thermodynamic properties of (1,3 -dioxane, or 1,4-dioxane + a non-polar liquid) atT= 298.15 K; speed of sound, excess isentropic and isothermal compressibilities and excess isochoric heat capacity

“…In this report, the speed of sound in these mixtures is measured and the isentropic and isothermal compressibilities and isochoric heat capacities are obtained from excess molar volumes, excess molar isobaric heat capacities, and excess thermal expansivities, already reported. (2)(3)(4) The mixing states of the mixtures are comprehensively discussed, together with previous results.…”

“…(1)(2)(3)(4) In the report of the thermodynamic properties of (cyclohexane + dioxane isomers), we found that non-polar 1,4-dioxane shows polar properties similar to 1,3-dioxane, due to local dipole moments due to bond dipole. (1) We have also reported the excess molar enthalpies H E m , (2) excess molar volumes V E m , (3) excess thermal expansivities α E , (3) and excess molar isobaric heat capacities C E 298.15 K. The non-polar solvents were selected by showing different intermolecular interactions: 2,2,4-trimethylpentane is a typical aliphatic non-polar solvent; tetrachloroethene has a π interactive site and symmetrical bond dipoles (Cl-C), and benzene is a typical aromatic, showing an induced dipole-dipole interaction with polar solvents. The difference in thermodynamic properties due to different intermolecular interaction is discussed in these papers.…”

“…(2)(3)(4) The speed of sound u was measured by the sing-around method (Cho-onpa, SVM-2). The cell used in the measurement of the speed of sound was immersed in a water bath controlled at T = (298.15 ± 3 · 10 −4 ) K. (5) The delay time of the apparatus was calibrated before and after every series of measurements of the speed of sound in water (6) and a slow drift in delay time was averaged in the time interval of the measurements.…”

“…using κ S calculated by using equation (1), the molar volume V m and thermal expansivity α of the mixture calculated from the excess molar volume V E m and excess thermal expansivity α E of the mixture (3) and the isobaric molar heat capacity C p,m of the mixture calculated from the excess isobaric molar heat capacity C E p,m of the mixture. (4) The isochoric molar heat capacity C V,m of the mixture was estimated using …”

Excess enthalpies and excess volumes of binary mixtures of hydrofluoroether with alcohols

“…The details of measurements are described elsewhere. (2,3) The densities of pure components are given in table 1, together with literature values. (4) …”