Thermodynamics of mixtures containing alkoxyethanols. Part XX. Densities, excess molar volumes, speeds of sound and isothermal compressibilities for 2-alkoxyethanol + dibutylether systems at 293.15, 298.15 and 303.15 K

Densities, ρ, and speeds of sound, u, of systems formed by 2-methoxyethanol (2ME), 2-ethoxyethanol (2EE) or 2-butoxyethanol (2BE) and dibutylether have been measured at 293.15, 298.15 and 303.15 K and atmospheric pressure using a vibrating tube densimeter and sound analyser Anton Paar model DSA-5000. The ρ and u values were used to calculate excess molar volumes, VE, and deviations from the ideal behaviour of the thermal expansion coefficient, ΔαP, or of the isentropic and isothermal compressibilities, ΔκS and ΔκT. The interactional contribution to these quantities is more important for systems with 2ME or 2EE. Structural effects are more relevant in the 2BE mixture.