Mixing Properties for Binary Liquid Mixtures of Methyl tert-Butyl Ether with Propylamine and Dipropylamine at Temperatures from (288.15 to 308.15) K

Abstract

Densities and sound velocity have been measured over the whole composition range for the binary liquid mixtures of methyl tert-butyl ether with propylamine and dipropylamine using an Anton Paar DSA 5000 density and sound analyzer at temperatures of (288.15, 293.15, 298.15, 303.15, and 308.15) K and atmospheric pressure. From these densities and speeds of sound, excess molar volumes and excess isentropic compressibility were calculated. All of the properties were fitted to Redlich-Kister equation. The variation of these properties with composition and temperature of the mixture is discussed in terms of molecular interactions.

Volumetric and Acoustic Behavior of Sodium Cyclamate in Aqueous System from 293.15 K to 318.15 K

“…15, 298.15, 303.15, 313.15, 308.15 and 318.15 K and compared with the reported values, which are given in Table 1. There is good agreement between experimental and literature values [10][11][12][13]. The mixtures were prepared by mass and were kept in special airtight stopper glass bottles to avoid evaporation.…”

“…The apparent molar volume (U V ) of aqueous SC sweetener is given by the following equation [13,18]:…”

An Interaction Study of Chloro and Alkyl Substituted Benzylamine with DPPH● through UV Spectrophotometric and Physicochemical Methods at T = (298.15, 303.15 and 308.15) K

“…Absorbance was measured at 517 nm with Spectro 2060 plus model UV/V is spectrophotometer, and RSAs were determined as a decrease in absorbance of DPPH • . Their densities and sound velocities were measured by Anton Paar Density and Sound velocity meter DSA 5000 M with ±10 −3 kg•m −3 accuracy [21]. For each measurement, the tube was cleaned with acetone and dried by passing dry air through the tube by inbuilt air pump.…”

Surface tension, viscosity, apparent molal volume, activation viscous flow energy and entropic changes of water + alkali metal phosphates at T = (298.15, 303.15, 308.15) K

“…Densities were measured with ± 10 −3 kg m − 3 accuracy by Anton Paar Density and Sound velocity meter DSA 5000 M. This equipment works based on oscillation periods of quarts U tube with air, solvent and solutions [11]. The meter was calibrated with water and dry air as per the manufacturer's instructions (DMA instruction manual; Anton Paar, Graz, Austria).…”