Compressibility of Molecular Liquids and Liquid Mixtures

1996 ◽  
Vol 49 (4) ◽  
pp. 521 ◽  
Author(s):  
EK Goharshadia ◽  
A Boushehri
Keyword(s):  
Experimental Data ◽  
Bulk Modulus ◽  
Pressure Dependence ◽  
Equations Of State ◽  
Liquid Mixtures ◽  
Mechanical Theory ◽  
Molecular Liquids ◽  
Statistical Mechanical ◽  
Good Agreement

The linear pressure dependence of the bulk modulus of selected molecular liquids and liquid mixtures has been investigated by using equations of state based on statistical-mechanical theory. The calculated values of the bulk modulus for N2, Ar+N2 and Kr+Xe are in good agreement with reliable experimental data.

The mutual diffusion coefficient of ethanol–water mixtures: determination by a rapid, new method

1974 ◽  
Vol 336 (1606) ◽  
pp. 393-406 ◽  
Keyword(s):  
Experimental Data ◽  
Diffusion Coefficient ◽  
Laminar Flow ◽  
Diffusion Coefficients ◽  
Entire Range ◽  
Liquid Mixtures ◽  
Mutual Diffusion ◽  
Mutual Diffusion Coefficient ◽  
Mechanical Theory ◽  
Statistical Mechanical

Mutual diffusion coefficients for liquid mixtures of ethanol and water have been measured over the entire range of composition and for temperatures from 25 to 65 °C at a pressure of 1 bar (10 5 Pa). At the lowest temperature, the results establish the validity of a new experimental method based upon Taylor’s analysis of solute dispersion in laminar flow. The method offers advantages of simplicity and speed over other techniques, and allows direct measurement of diffusion coefficients at well-defined mixture compositions. The experimental data have an estimated uncertainty of ±2.5% . The results have been utilized to evaluate friction coefficients arising in the statistical mechanical theory of transport in liquid mixtures.

Nanoparticles Size in Fe73.5Cu1Mo3Si13.5B9 Melt

2020 ◽  
Vol 861 ◽  
pp. 107-112
Author(s):  
Vladimir S. Tsepelev ◽  
Yuri N. Starodubtsev ◽  
Kai Ming Wu ◽  
Yekaterina A. Kochetkova
Keyword(s):  
Experimental Data ◽  
Diffusion Coefficient ◽  
Critical Temperature ◽  
Temperature Dependence ◽  
Kinematic Viscosity ◽  
Arrhenius Equation ◽  
Reaction Rates ◽  
Mechanical Theory ◽  
Statistical Mechanical ◽  
Absolute Reaction

The size of the nanoparticles participating in the viscous flow and the diffusion coefficient were calculated using statistical mechanical theory of absolute reaction rates and the Arrhenius equation. As experimental data, temperature dependence of the kinematic viscosity and density of Fe73.5Cu1Mo3Si13.5B9 melt was used. At a temperature of 1600 K, after the melt is overheated above the critical temperature Tk = 1770 K, the nanoparticles size decreases from 0.92 to 0.47 nm, and the diffusion coefficient increases from 2.4·10-10 to 4.5·10-10 m2·s-1.

scholarly journals Torque and buckling in stretched intertwined double-helix DNAs

2017 ◽  
Author(s):  
Sumitabha Brahmachari ◽  
John F. Marko
Keyword(s):  
Experimental Data ◽  
Mechanical Model ◽  
Double Helix ◽  
Magnetic Tweezers ◽  
Applied Force ◽  
Linking Number ◽  
Opposite Trend ◽  
Statistical Mechanical Model ◽  
Statistical Mechanical ◽  
Good Agreement

We present a statistical-mechanical model for the behavior of intertwined DNAs, with a focus on their torque and extension as a function of their catenation (linking) number and applied force, as studied in magnetic tweezers experiments. Our model produces results in good agreement with available experimental data, and predicts a catenation-dependent effective twist modulus distinct from what is observed for twisted individual double-helix DNAs. We find that buckling occurs near to the point where experiments have observed a kink in the extension versus linking number, and that the subsequent “supercoiled braid” state corresponds to a proliferation of multiple small plectoneme structures. We predict a discontinuity in extension at the buckling transition corresponding to nucleation of the first plectoneme domain. We also find that buckling occurs for lower linking number at lower salt; the opposite trend is observed for supercoiled single DNAs.

Equations of state and pressure dependence of bulk modulus for aggregated diamond nanorods

2018 ◽  
Vol 92 (8) ◽  
pp. 985-988 ◽  
Author(s):  
G. R. Patel ◽  
N. A. Thakar ◽  
T. C. Pandya
Keyword(s):  
Bulk Modulus ◽  
Pressure Dependence ◽  
Equations Of State

Measurements and Theoretical Analysis of Excess Molar Volumes for Binary Mixtures of Dimethyl Sulfoxide with Xylenes

2008 ◽  
Vol 59 (10) ◽  
Author(s):  
Oana Ciocirlan ◽  
Olga Iulian
Keyword(s):  
Experimental Data ◽  
Theoretical Analysis ◽  
Dimethyl Sulfoxide ◽  
Atmospheric Pressure ◽  
Composition Range ◽  
Excess Molar Volumes ◽  
Liquid Mixtures ◽  
Molar Volumes ◽  
Binary Liquid ◽  
Good Agreement

Excess molar volumes, VE, have been measured for binary liquid mixtures of dimethyl sulfoxide (DMSO) with xylenes (o- xylene, m- xylene and p-xylene) at 298.15 K and atmospheric pressure. The excess volumes values were found negative over the entire composition range for all the mixtures. The VE values increase in order: p-xylene[ m-xylene[ o-xylene. The Flory and Prigogine-Flory-Patterson (PFP) thermodynamic theories of solution have been used to analyze the VE data. The calculated VE values were found to be in good agreement with the experimental data.

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