Excess enthalpy, density, and speed of sound for the ternary mixture methyl tert-butyl ether (1) + butan-1-ol (2) + octane (3).

EVA MASCATO; LELIA MUSSARI; MIGUEL POSTIGO; ALEJANDRA MARIANO; MANUEL M PIÑEIRO; JOSÉ LUIS LEGIDO; M. I. PAZ ANDRADE

JOURNAL OF CHEMICAL AND ENGINEERING DATA

AMER CHEMICAL SOC

Lugar: Washington; Año: 2009 vol. 54 p. 453 - 458

0021-9568

Excess molar enthalpies, HE(x, T), at T ) 298.15 K, densities, F(x, T), and speeds of sound, u(x, T), at temperatures T ) (288.15 to 308.15) K and atmospheric pressure have been measured for the ternary system methyl tert-butyl ether (MTBE) (1) + butan-1-ol (2) + octane (3). Also, densities, F(x, T), and speeds of sound, u(x, T), for the binary mixture MTBE (1) + octane (3) and excess molar enthalpies, HE(x, T), T ) 298.15 K, for the binary mixture butan-1-ol (2) + octane (3) have been measured. From experimental data, excess molar volumes, VE(x, T), and excess isentropic compressibility, κS E (x, T), were calculated. The Cibulka equation was used to correlate the ternary contribution to the experimental excess molar volume and excess isentropic compressibility. Additionally, excess molar enthalpies were correlated with the Nagata and Tamura equation, and the experimental results are compared with the estimations obtained by applying the groupcontribution models of UNIFAC and DISQUAC.