Thermodynamic properties of {xC2H5OH+(1−x)H2O} in the temperature range from 320 K to 420 K at pressures up to 200 MPa

Measurements of (p, ρ,T) at given temperatures and pressures in the compressed liquid phase for {xC2H5OH + (1−x)H2O} withx= (0.1002, 0.2503, 0.4999, 0.7459 and 0.8904) were carried out with a metal-bellows variable volumometer along six isotherms betweenT= 320 K andT= 420 K at pressures from the bubble pressure to 200 MPa. The results cover the high-density region from ρ = 863 kg·m−3to ρ = 1019 kg·m−3forx= 0.1002, from ρ = 798 kg·m−3to ρ = 976 kg·m−3forx= 0.2503, from ρ = 727 kg·m−3to ρ = 929 kg·m−3forx= 0.4999, from ρ = 684 kg·m−3to ρ = 899 kg·m−3forx= 0.7495, and from ρ = 665 kg·m−3to ρ = 885 kg·m−3forx= 0.8904. The experimental uncertainties of temperatureT, pressureP, density ρ, and mole fractionxwere estimated to be ± 3 mK, ± 1.0−10−3·ρ, 1.0·10−3·ρ, and ± 6·10−4·x, respectively. Measurements of saturated liquid density and bubble pressure at temperatures from 320 K to 420 K are also reported. The bubble pressure indicate positive deviations from Raoult's law at all temperatures measured. The excess molar volumes indicate negative values in the temperature and pressure range of the present measurements and approach zero with increasing pressure.