Vapour pressures and excess Gibbs free energies of cyclohexane + n-hexane, + n-heptane and + n-octane at 298. 150 K

1980 ◽  
Vol 33 (10) ◽  
pp. 2133 ◽  
Author(s):  
ML Martin ◽  
JC Youings
Keyword(s):  
Chain Length ◽  
Mole Fraction ◽  
Vapour Pressure ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Free Energies ◽  
Excess Function ◽  
Binary Liquid

By means of a continuous dilution vapour pressure apparatus the excess Gibbs free energies of binary liquid mixtures of cyclohexane with n- hexane, n-heptane and n-octane at 298.150 K have been determined. The values of this excess function were positive at all concentrations and decreased with an increase in the chain length of the n-alkane. The maximum values, 75.9, 49.7 and 24.6 J mol-1, for the respective systems occurred in mixtures with a mole fraction of cyclohexane greater than 0.5.

scholarly journals Excess volumes for binary liquid mixtures of 1-chlorobutane with normal alkanes

1980 ◽  
Vol 33 (11) ◽  
pp. 2543 ◽  
Author(s):  
A Krishnaiah ◽  
DN Rao ◽  
PR Naidu
Keyword(s):  
Chain Length ◽  
Binary Mixtures ◽  
Entire Range ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Excess Volumes ◽  
Excess Function ◽  
Normal Alkanes ◽  
Binary Liquid

Excess volumes for binary mixtures of 1-chlorobutane with hexane, heptane, octane and nonane were measured dilatometrically at 303.15 K. Excess volumes are positive over the entire range of composition in the four mixtures. Further, it is observed that increase in chain length increases the magnitude of the excess function.

Thermodynamic Excess Functions of Binary Liquid Mixtures with Chain Association of One Component*. Part I: The Excess Gibbs Free Energy GE/RT

1976 ◽  
Vol 31 (12) ◽  
pp. 1651-1660 ◽  
Author(s):  
F. Becker ◽  
M. Kiefer ◽  
P. Rhensius ◽  
H. D. Schäfer
Keyword(s):  
Free Energy ◽  
Gibbs Free Energy ◽  
Chain Length ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Excess Gibbs Free Energy ◽  
Component Part ◽  
Excess Functions ◽  
Binary Liquid ◽  
Self Association

Abstract In this paper equilibrium models for the calculation of the excess Gibbs free energy of binary liquid mixtures are developed, the component A of which undergoes chain-forming self-association whilst the component B acts as an 'inert' solvent. It is shown that the extension of the well-known chain-association model of Mecke and Kempter, in which the probability of chain prolongation is assumed to be independent of chain length, is unable to establish satisfactory results because it does not exhibit sufficient unsymmetry. Reduction of the probability of chain growth with in-creasing chain length leads to an improved model with the geometric series replaced by the exponential series. This model, in which only two parameters are used, i. e. the equilibrium constants K for mutual solvation of A and B, and ρ for self-association of A, allows fitting of isothermal experimental GE /R T literature data on cycloalkanol-cycloalkane, alkanol-alkane, and NMF -CCl4 systems within the limits of experimental error. Compared with the two-parameter Wilson equation which gives equally small standard deviations, our equilibrium model has the advantage of allowing passage from GE to HE data and of being applicable to liquid-liquid equilibria.

scholarly journals Viscosities of binary liquid mixtures of polar and non-polar solvents at 303.15 k

2020 ◽  
Vol 6 ◽  
pp. 80-82
Author(s):  
Sandeep Sudhanshu
Keyword(s):  
Methyl Ethyl Ketone ◽  
Mole Fraction ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
The Other ◽  
Methyl Ethyl ◽  
Polar Solvents ◽  
Binary Liquid ◽  
Deviation In Viscosity

This paper explains the various characteristics of liquid and liquid mixtures. In this paper viscosities for the binary liquid mixtures of methyl ethyl ketone with benzene, nitrobenzene, cblorobenzene and bromobenzene were determined at 303.15 K. The deviation in viscosity was calculated and its behaviours was studied as a function of mole fraction. The deviation in viscosity is negative in the system methyl ethyl ketone with benzene and is positive in the other systems. The results were discussed in terms of interactions.

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