Acoustical properties of ternary mixtures of 1-alkanols in di-isopropyl ether and 2,2,2-trifluoroethanol mixed solvent

Abstract

Ultrasonic velocity (<i style="">U</i>), density (ρ) and viscosity (<img src='/image/spc_char/Etta.gif' border=0>) for the ternary liquid mixtures of diisopropyl ether+2,2,2-trifluoroethanol+1-propanol, diisopropyl ether+2,2,2-trifluoroethanol+1-butanol and diisopropyl ether+2,2,2-trifluoro-ethanol+1-pentanol have been measured as a function of the composition at 303, 308 and 313 K. The experimental data have been used to calculate some excess thermodynamical parameters such as viscosity (<img src='/image/spc_char/Etta.gif' border=0>^E), adiabatic compressibility (<img src='/image/spc_char/beta.gif' border=0>^E), free length (<i>L</i>^E_f), free volume (<i>V</i>^E_f), internal pressure (<img src='/image/spc_char/pi.gif' border=0>^E_i) and Gibb’s free energy (<img src='/image/spc_char/delta.gif' border=0><i>G</i>^E). The results have been discussed and interpreted in terms of structural and specific interaction predominated by hydrogen bonding.