Densities and surface tensions of propyl acetate plus xylenes or plus ethylbenzene from (298.15 to 308.15) K

Densities and surface tensions for binary systems of (propyl acetate + o-xylene, + m-xylene, + p-xylene, + ethylbenzene) were measured under normal atmospheric pressure over the entire mole fraction range from (298.15 to 308.15) K. The excess molar volumes V (E) and surface tension deviations delta sigma for the above systems were calculated and fitted to the Redlich-Kister polynomial equation. The V (E) for the systems of (propyl acetate + m-xylene, + ethylbenzene) are nearly zero, but for the systems of (propyl acetate + o-xylene, + p-xylene) are negative. The delta sigma values are negative for all of the four systems. The V (E) of the four systems hardly change with increasing temperature, but their absolute values of delta sigma decrease with increasing temperature.