Study of concentration dependent Physico-chemical properties of 1–Propanol, Benzonitrile and their binary mixtures
Volume: 3 - Issue: 01 - Date: 01-01-2014
Approved ISSN: 2278-1412
Published Id: IJAECESTU223 | Page No.: 297-301
Author: A. N. Prajapati
Co- Author: C. S. Limberkar
Abstract:-In the present work static dielectric constant (ε0), refractive index (n) and density (ρ)
have been experimentally determined for binary liquid mixture of 1-Propanol (1-PrOH) with
benzonitrile (BN) over the entire concentration range of mixture composition (0.0 →1.0) at
constant temperature 303.15 K. Static dielectric constant (ε0) and refractive index (n) for the
binary mixture have been measured using high precision LCR meter (2 MHz) and Abbe’s
refractometer respectively. Molar refraction (Rm), atomic polarization (PA), molecular radius (r)
and polarizability (α) and internal pressure (Pint) for each the binary mixtures were calculated
from the measured values of refractive indices and densities. Using the experimental data various
excess parameters namely; excess static dielectric constant (ε0)
E
, excess refractive index (n)E
,
excess density (ρ)E
, excess molecular radius (r)E
, excess atomic polarization(PA)
E
, excess internal
pressure (Pint)
E
have been computed and discussed in terms of hetero-interaction (i.e. interaction
between unlike molecules). These excess parameters were fitted to the Redlich-Kister polynomial
equation to derive the binary coefficients and standard deviations. In order to predict the static
dielectric constant (ε0) and refractive index (n) for binary mixtures several mixing rules were
applied and their validity have been tested for the same
Key Words:-Alcohol, binary mixtures, density, internal pressure, static dielectric constant refractive index
Area:-Engineering
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