VISCOSITIES AND DEVIATIONS IN VISCOSITY FOR BINARY MIXTURES OF TETRAHYDROFURAN + PROPANOL-1 AND TETRAHYDROFURAN + BUTANOL-1 AT 303.15 K

Ponchomi Raha, Mahmuda Sultana, M. Kamrul Hossain, M. Abdur Rahaman

Abstract: The viscosities, ? of pure tetrahydrofuran, propanol-1 and butanol-1and some of their binary mixtures covering the whole composition range have been measured at temperatures 303.15 K. From the experimental ?, the deviations in viscosity (??) have been calculated. Excess free energy for viscous flow, ?G#E has also been evaluated. The concentration dependences of ? were correlated to polynomial expressions, whereas, ?? and ?G#E were fitted to the Redlich–Kister equation. For all systems, ?? were found to be negative in the whole range of composition with a single lobe.

Keywords: Viscosity, Tetrahydrofuran, Propanol-1, Butanol-1.

DOI: https://doi.org/10.15623/ijret.2015.0405029