Open AccessActivity coefficients and excess Gibbs energy functions of acetophenone with 1,2-dichloroethane and 1,1,2,2-tetrachloroethane binary mixtures by using NRTL, UNIQUAC, UNIFAC and VAN LAAR models at a local atmospheric pressure of 95.3 kPa
Author(s) -
P. Anila,
K. Rayapa Reddy,
G. Srinivasa Rao,
P.V.S. Sai Ram,
D. Ramachandran,
C. Rambabu
Publication year - 2016
Publication title -
karbala international journal of modern science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.345
H-Index - 17
eISSN - 2405-6103
pISSN - 2405-609X
DOI - 10.1016/j.kijoms.2016.07.001
Subject(s) - uniquac , unifac , non random two liquid model , thermodynamics , chemistry , activity coefficient , bubble point , gibbs free energy , organic chemistry , bubble , physics , aqueous solution , mechanics
Bubble point temperatures of pure liquids (Acetophenone, 1,2-dichloroethane and 1,1,2,2-tetrachloroethane) and their liquid mixtures were measured over complete composition range at a local atmospheric pressure of 95.3 kPa using a Swietoslawski-type ebulliometer. The data were then correlated with Antoine's equation. From the data activity coefficients and Gibbs energies were calculated. The systems showed a positive deviation from Raoult's law which suggests the presence of the dispersal forces acting between component molecules in the liquid mixture. NRTL, UNIQUAC, UNIFAC and VAN LAAR models have also been applied and good results were obtained. Molecular interactions between the unlike molecules in the binary liquid mixtures are discussed