화학공학소재연구정보센터
Journal of Chemical and Engineering Data, Vol.48, No.4, 836-840, 2003
Excess molar volumes, viscosities, and heat capacities for the mixtures of ethylene glycol plus water from 273.15 K to 353.15 K
Experimental densities, viscosities, and heat capacities at different temperatures were measured over the entire mole fraction range for the binary mixture of ethylene glycol + water. Density values were used in the determination of excess molar volumes, V-E. The excess volumes, V-E, are fitted as a function of the mole fraction to a polynomial. Deltaeta was fitted to the Redlich-Kister equation. The excess volumes are negative over the entire composition at the lower temperatures. They show a U-shaped concentration dependence and decrease in absolute value with increasing temperature. At high temperatures, the excess molar volume shows an S-shaped dependence. Deltaeta values are negative over the entire range of mole fraction and have a very similar trend to that for VE. The heat capacities of mixtures have the maximum values at x(1)=0.0312.