Partial Molar Volumes of 15-Crown-5 Ether in Mixtures of N,N-Dimethylformamide with Water

摘要

The density of 15-crown-5 ether (15C5) solutions in the mixtures of N,Ndimethylformamide(DMF) and water (H2O) was measured within the temperature range293.15–308.15 K using an Anton Paar oscillatory U-tube densimeter. The results wereused to calculate the apparent molar volumes (VU) of 15C5 in the mixtures of DMF + H2Oover the whole concentration range. Using the apparent molar volumes and Redlich andMayer equation, the standard partial molar volumes of 15-crown-5 were calculated atinfinite dilution (V m). The limiting apparent molar expansibilities (α) were also calculated.The data are discussed from the point of view of the effect of concentration changes oninteractions in solution.