화학공학소재연구정보센터
Journal of Chemical and Engineering Data, Vol.47, No.6, 1521-1525, 2002
Limiting activity coefficients of lower 1-alkanols in n-alkanes: Variation with chain length of solvent alkane and temperature
Limiting activity coefficients (gamma(1)(infinity)) of lower 1-alkanols (methanol, ethanol, 1-propanol, 1-butanol) in n-alkanes (hexane, heptane, octane, decane, dodecane, tetradecane, hexadecane) were systematically determined to obtain reliable information about their variation with the chain length of solvent alkane and temperature. Using the inert gas stripping technique, gamma(1)(infinity) values were determined at 293.15 K and for methanol and ethanol in hexane, heptane, and octane at 5 K increments between 288 K and 323 K. The present data appear to be of higher accuracy than most previous measurements and are shown to be consistent with the solution-of-groups concept, the modified Flory-Huggins combinatorial of Kikic et al., and the calorimetric information on limiting partial molar excess enthalpies.