Volume properties of the H2O-DMF mixture at the pressure 0.101 MPa in the temperature range 278.15-323.15 K

Abstract

The density of the water-N,N-dimethylformamide mixture throughout the entire range of compositions in the temperature range 278.15-323.15 K at atmospheric pressure (0.101 MPa) was measured. The coefficients of thermal dilatation α were calculated. The α value strongly depends on the composition of the mixture in the range 0 < X <: 0.3 (X is the molar fraction of dimethylformamide), which is associated with breakdown of water structure. An equation relating the molar volume of the water-dimethylformamide mixture to the composition of the mixture and to the temperature was proposed.