Excess and Unlike Interaction Second Virial Coefficients and Excess Enthalpy of Mixing of (Carbon Monoxide + Pentane)

1995 ◽  
Vol 40 (2) ◽  
pp. 452-454 ◽  
Author(s):  
Peter J. McElroy ◽  
S. Buchanan
Keyword(s):  
Carbon Monoxide ◽  
Excess Enthalpy ◽  
Virial Coefficients ◽  
Enthalpy Of Mixing ◽  
Second Virial Coefficients ◽  
Excess Enthalpy Of Mixing

Calculation of second virial coefficients for nitrogen and carbon monoxide

1980 ◽  
Vol 58 (6) ◽  
pp. 820-827 ◽  
Author(s):  
M. D. Whitmore ◽  
D. A. Goodings
Keyword(s):  
Carbon Monoxide ◽  
Good Accuracy ◽  
Power Series Expansion ◽  
Virial Coefficients ◽  
Coulomb Repulsion ◽  
Intermolecular Potential ◽  
Potential Models ◽  
Second Virial Coefficients ◽  
Gaussian Integration ◽  
Anisotropic Part

The classical second virial coefficients B(T) for nitrogen and carbon monoxide have been calculated exactly as a function of temperature for three different realistic models of the intermolecular potential. The potential models, due to Kohin, Raich and Mills, and Raich and Gillis, differ mainly, but not solely, in the way in which they represent the short-range Coulomb repulsion between molecules. As this interaction depends on the molecules' shapes, it is highly anisotropic. To ensure good accuracy in the results for B(T) the angular and radial integrals were performed by suitable Gaussian integration methods.The contributions to B(T) of various anisotropic terms are considered, and a power series expansion in terms of the anisotropic part of the potential discussed. The calculated results are compared with experiments, and some general conclusions drawn.

Infrared powder-absorption spectroscopy of Ca-free P21/c clinopyroxenes

2001 ◽  
Vol 65 (3) ◽  
pp. 339-350 ◽  
Author(s):  
T. Boffa Ballaran ◽  
M. A. Carpenter ◽  
N. L. Ross
Keyword(s):  
Solid Solution ◽  
Room Temperature ◽  
Excess Enthalpy ◽  
Enthalpy Of Mixing ◽  
Positive Deviation ◽  
Fe Content ◽  
Phonon Spectra ◽  
Vibrational Bands ◽  
Ir Bands ◽  
Excess Enthalpy Of Mixing

AbstractInfrared powder-absorption spectra of ten synthetic P21/c pyroxenes with compositions in the clinoenstatite–clinoferrosilite system have been collected at room temperature in the range 50–1500 cm−1. Variations of peak positions as a function of Fe content have been obtained for those vibrational bands whose trend could be followed across the solid solution. Local elastic strains arising from cation substitution have been quantified by means of the autocorrelation function, which gives a measure (Δcorr) proportional to the line width of the IR bands. The structure of clinoenstatite appears to be very homogeneous, whereas Fe-rich pyroxenes have high degrees of local structural hetereogeneities. A positive deviation from linearity of the Δcorr values is observed in the spectral region between 100 and 250 cm−1 and may be indicative of a positive excess enthalpy of mixing of this solid solution. At higher energies the large changes in the phonon spectra as Fe content increases are associated with rotation and deformation of the tetrahedral chains for accommodating the larger cation. The results are compared with similar studies on other chain silicates.

scholarly journals Salt effect on the enthalpy of mixing of 2-propanol + acetic acid at 303.15 K

2009 ◽  
Vol 11 (4) ◽  
pp. 20-23 ◽  
Author(s):  
R. Tamilarasan ◽  
Sunil Baffna ◽  
A. Anand-Prabu ◽  
M. Dharmendira-Kumar
Keyword(s):  
Acetic Acid ◽  
Binary System ◽  
Zinc Chloride ◽  
Excess Enthalpy ◽  
Salt Effect ◽  
Enthalpy Of Mixing ◽  
Inorganic Salts ◽  
Kister Equation ◽  
Excess Enthalpy Of Mixing ◽  
The Ideal

Salt effect on the enthalpy of mixing of 2-propanol + acetic acid at 303.15 K This paper presents the effect of two dissolved inorganic salts (zinc chloride, ZnCl2 and ammonium chloride, NH4Cl) on the enthalpy of mixing (HE) of 2-propanol + acetic acid binary system measured at 303.15 K using an isothermal displacement calorimeter with vapour space. A decreasing trend in the excess enthalpy of mixing values in the presence of ZnCl2 and NH4Cl indicate the endothermic behavior of this system. The Redlich-Kister equation has been used to fit the experimental HE data. The deviations from the ideal value and binary parameters were calculated and reported.

Sign in / Sign up

Export Citation Format

Share Document