Excess volumes, viscosities and compressibilities of binary mixtures consisting of propan-1-ol , butan-1-ol and pentan-1-ol with 1,2-dibromoethane at different temperatures
2268-2273The density,
viscosity and ultrasonic velocity in binary mixtures of propan- l-ol, butan - 1
-ol and pentan- 1-ol with 1,2- dibromoethane have been determined at different
temperatures from 298.15 to 313.15 K over the whole composition range. Using these
parameters the excess volume (VE), excess viscosity(ηE)
excess compressibility (KsE), inter molecular free
length (Lf) and Grunberg and Nissan parameter d have
been evaluated. The values or (VE) for propan- 1 -ol + 1,2-dibromoethane
system and butan - 1 -ol+ 1 ,2-dibromoethane system are found to be negative at
all temperatures whereas for pentan- 1 -ol + 1,2-dibromoethane the (VE)
values are observed to be negative at low concentration of pentan - 1 -ol (up to
0.1 mole fraction). However, this parameter is found to be positive above 0.1 mole
fraction. ηE values are observed to be negative for all the systems over
the entire composition range. The observed value of excess adiabatic compressibility
is found to be negative for propan- 1-ol + 1,2 - dibromoethane and butan- 1-ol
+ 1,2-dibromoethane and positive for pentan- 1 -ol + 1,2-dibromoethane. Analysis
of these parameters indicates that there are inter molecular interactions among
components or the binary mixtures that lead to the possible hydrogen bond formation
(of the type Br.
.. H-O) between unlike molecules