Densities and volumetric properties of pyridine with 2-dimethylaminoethanol and 2-diethylaminoethanol at temperatures from 293.15 to 313.15 K

Abstract

ABSTRACT The densities ρ of binary mixtures of 2-(dimethylamino)ethanol and 2-diethylaminoethanol with pyridine were measured over the entire concentration range at 293.15, 303.15 and 313.15 K. The values of excess molar volume, V m E , apparent molar volume, V φ , DMAE and V φ , DEAE ; partial molar volumes, V ˉ m , 1 and V ˉ m , 2 , excess partial molar volumes, V ˉ m , 1 E and V ˉ m , 2 E have been computed using the experimental observations. The partial molar volumes, V ˉ m , 1 o and V ˉ m , 2 o ; excess partial molar volumes, V ˉ m , 1 oE and V ˉ m , 2 oE at infinite dilution were also calculated. The variations of these parameters as a function of composition and temperature are discussed in terms of the intermolecular interactions in the studied binary mixtures.