ON THE RELATIONSHIP BETWEEN INTERNAL PRESSURE AND ULTRASONIC VELOCITY

1963 ◽  
Vol 41 (7) ◽  
pp. 1787-1793 ◽  
Author(s):  
S. C. Srivastava ◽  
N. Berkowitz
Keyword(s):  
Internal Pressure ◽  
Aqueous Electrolyte ◽  
Electrolyte Solutions ◽  
Liquid Mixtures ◽  
Molar Refraction ◽  
Ultrasonic Waves ◽  
Pressure Data ◽  
Binary Liquid ◽  
The Relationship ◽  
General Method

Because of the relevance of internal pressure data to sonochemical kinetics, some interest attaches to expressions which permit evaluation of Pi from readily available or easily measured quantities. One such expression is developed in this paper. It relates Pi to the velocity u of ultrasonic waves transmitted through the liquid and takes the form u√D = K′√(Rm)Pi where K′ is a constant proportional to √(Cp/Cv)√(1/RT), and D and Rm denote the density and molar refraction of the liquid.The utility of this expression is tested against some 100 liquids (including a few binary liquid mixtures and aqueous electrolyte solutions), and it is shown that the equation offers an acceptable and quite general method for calculating Pi.

Solvent structure. III. The dependence of partial molal volumes on internal pressure and solvent compressibility

1976 ◽  
Vol 29 (4) ◽  
pp. 779 ◽  
Author(s):  
MRJ Dack
Keyword(s):  
Ascorbic Acid ◽  
Internal Pressure ◽  
Aqueous Electrolyte ◽  
Electrolyte Solutions ◽  
Solvent Structure ◽  
Pressure Data ◽  
Intrinsic Volumes ◽  
Volume Contraction ◽  
Partial Molal Volumes ◽  
Molal Volumes

Partial molal volumes, V�, at 25�C were measured for sucrose, ascorbic acid and aspirin in the solvents water, formamide, N,N-dimethylformamide and methanol. The dependence of V� on solvent compressibility enabled an estimate to be made of the intrinsic volumes, Vint, of the dissolved non-electrolytes. Effective pressures, Pe, in aqueous electrolyte solutions were calculated from previously determined internal pressure data. Substitution of Pe into the Tait-Gibson equation yielded values of Ve, the volume contraction of water due to electrostriction, which agree well with values obtained by other methods.

scholarly journals Theoretical Evaluation of Internal Pressure in Ternary and Sub-Binary Liquid Mixtures at Various Temperatures

2013 ◽  
Vol 4 ◽  
pp. 82-95
Author(s):  
J. Madhumitha ◽  
N. Santhi ◽  
G. Alamelumangai ◽  
M. Emayavaramban
Keyword(s):  
Internal Pressure ◽  
Liquid Mixture ◽  
Liquid Mixtures ◽  
Butyl Alcohol ◽  
Molar Refraction ◽  
Binary Liquid Mixtures ◽  
Theoretical Evaluation ◽  
Binary Liquid ◽  
Experimental Values ◽  
Internal Pressures

The Internal pressures of Ternary and their Sub-Binary liquid mixtures of benzene(1) + hexane(2) + sec-butyl alcohol(3) were calculated using density, velocity and molar refraction from the temperature range of 303.15K-318.15K. For the Binary liquid mixtures, the Experimental Internal pressure values were correlated through an equation proposed by Andiappan et.al. For the Ternary liquid mixture, the Experimental Internal pressure values were correlated through an equation proposed by us. The Experimental values and the Theoretical values are in close agreement with each other

scholarly journals Estimation of Internal Pressure of Liquids and Liquid Mixtures

2013 ◽  
Vol 5 ◽  
pp. 1-7 ◽  
Author(s):  
N. Santhi ◽  
P.L. Sabarathinam ◽  
G. Alamelumangai ◽  
J. Madhumitha ◽  
M. Emayavaramban
Keyword(s):  
Critical Temperature ◽  
Theoretical Model ◽  
Internal Pressure ◽  
Liquid Mixtures ◽  
Volume Data ◽  
Average Absolute Deviation ◽  
Absolute Deviation ◽  
Van Der Waals Equation ◽  
Binary Liquid ◽  
Proposed Model

By combining the van der Waals’ equation of state and the Free Length Theory of Jacobson, a new theoretical model is developed for the prediction of internal pressure of pure liquids and liquid mixtures. It requires only the molar volume data in addition to the ratio of heat capacities and critical temperature. The proposed model is simple, reliably accurate and capable of predicting internal pressure of pure liquids with an average absolute deviation of 4.24% in the predicted internal pressure values compared to those given in literature. The average absolute deviation in the predicted internal pressure values through the proposed model for the five binary liquid mixtures tested varies from 0.29% to 1.9% when compared to those of literature values.

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