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Excess thermodynamic properties of binary and ternary mixtures containing methyl 1,1-dimethylethyl ether (MTBE),n-heptane, and methanol atT =  313.15 K

✍ Scribed by José J. Segovia; Marı́a C. Martı́n; César R. Chamorro; Miguel A. Villamañán

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
426 KB
Volume
31
Category
Article
ISSN
0021-9614

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✦ Synopsis

Vapour + liquid) equilibrium of {methyl 1,1-dimethylethyl ether (MTBE) + n-heptane + methanol}, {methyl 1,1-dimethylethyl ether (MTBE) + methanol}, and (methanol + n-heptane) have been measured at T = 313.15 K. The data reduction by Barker's method provides correlations for the excess molar Gibbs energy G E m using the Margules equation for the binary systems, and the Wohl expansion for the ternary. The Wilson, NRTL, and UNIQUAC models have been applied successfully to both the binary and ternary systems reported here. Using literature data of the excess molar enthalpy H E m for the same ternary mixture measured at T = 313.15 K, we have calculated the excess molar entropy S E m for the system at the same temperature.

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TABLE 1. Densities ρ for the pure liquids at T = 298.15 K Liquid ρ/(g • cm -3 ) expt lit 1-Cholorooctane 0.86875 0.86876 (4) 1-Butanol 0.80575 0.80576