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

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, VmE, apparent molar volume, Vφ,DMAE and Vφ,DEAE; partial molar volumes, Vˉm,1 and Vˉm,2, excess partial molar volumes, Vˉm,1E and Vˉm,2E have been computed using the experimental observations. The partial molar volumes, Vˉm,1o and Vˉm,2o; excess partial molar volumes, Vˉm,1oE and Vˉm,2oE 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.