Transport and acoustic properties of pentyl acetate with butanol at 298.15 K to 318.15 K: Singh model and ab-initio approach.

Verma, Sweety; Rani, Manju; Song, Hojun; Maken, Sanjeev

The viscosity ($\eta $ η) and speed of sound ($u$ u) of binary pentyl acetate (1) isomers of butanol (2) mixtures were reported at T = 298.15 K to 318.15 K and at 0.1 MPa pressure. Using the experimental data, deviation in viscosity ($\Delta \eta $ Δη), deviation in speed of sound ($\Delta u$ Δu), and excess isentropic compressibility (${\kappa _s}^E$ κ s E ) were determined and these were fitted with the RK equation. The findings suggest that the behaviour of a mixture is affected by intermolecular interactions (dipole – dipole, H – bonding, dispersive, and cohesive force) and structural aspects of the molecule. The $\Delta \eta $ Δη and ${\kappa _s}^E$ κ s E curves were predicted well with the Singh model and ab – initio approach. At each temperature, the ${\kappa _s}^E$ κ s E values were positive for binary mixtures, whereas the $\Delta \eta $ Δη and $\Delta u$ Δu values were negative. The numeric values of $u$ u were determined through numerous correlations. This study delves into the relative importance of these relations with the experimental values of $u$ u.

SPEED of sound; INTERMOLECULAR interactions; COMPRESSIBILITY; BUTANOL; ISOMERS; BINARY mixtures

Physics & Chemistry of Liquids, 2025, Vol 63, Issue 1, p69

0031-9104

Academic Journal

10.1080/00319104.2024.2355649