The Linear Chain Clusters in Real Gases | Chapter 3 | New Ideas Concerning Science and Technology Vol. 12

 The author's new class of linear chain clusters is described in this chapter, as well as the methods for evaluating their properties. There are two types of clusters in real gases: linear clusters with a small number of bonds between particles and closely bound two and three dimensional clusters. For several pure gases, the experimental data analysis reveals large temperature and density zones dominated by linear chain clusters. At moderate densities of real gases, expanding the possible energy density sequence by the monomer fraction density yields cluster bond parameters and their equilibrium constants, which can be attributed to this new class of clusters. The computer-aided study of precise thermophysical data for pure fluids using monomer fraction density reveals wonderful properties of these unknown cluster structures in real gases. Extrapolating the properties of these loosely bound clusters to higher densities yields a variety of tightly bound three-dimensional clusters in sub- and supercritical fluids in general, and particularly in CO2. It's crucial to understand the structure and parameters of the clusters in this gas, which is commonly used in supercritical fluid technologies. The properties of massive three-dimensional clusters of numbers n of particles up to the level of one thousand are discovered by moving from diluted to dense gases step by step. The soft structural transition between dominating cluster fractions with neighbour numbers n and between gas-like and liquid-like supercritical fluids is studied using a logarithmic method to estimate the averaged numbers n of particles in three-dimensional clusters.

Author (s) Details

Boris Sedunov
Computer and Information Systems Department, Russian New University, Moscow, Russia.

View Book :- https://stm.bookpi.org/NICST-V12/article/view/773

The Pure Gases' Thermophysical Data Computer Aided Analysis | Chapter 12 | New Insights into Physical Science Vol. 11

In order to investigate molecular interactions and cluster parameters, a computer-aided analysis of thermophysical data from electronic databases for pure gases has been developed. As an advanced forum for education in thermodynamics, pure gases can be used. This method is based on the corresponding expansion of thermophysical values by degrees of monomer fraction density in the Mass Action Law sequence. In this process, the series expansion terms directly represent the properties of the corresponding cluster fractions, unlike the viral expansion by total density powers. Among thermophysical properties, internal energy was selected as the most informative for this process. The thermal analysis of its series expansion coefficients allows the temperature dependencies of the parameters of the pair bond, the bond energies of the clusters and the equilibrium constants, the soft structural transitions between the dominant cluster isomers, to be calculated. The application of the method to various pure gases, including van der Waals noble and molecular gases, and polar molecular interactions, brings the characteristics of unknown clusters of gases under investigation. The Thermal Area  No trivial isotopic effects are shown by the study of ordinary and heavy water vapours. In addition to dispersion forces, the unpredictable growth of pair bond energy with temperature in Alkanes points to the presence of certain unknown molecular interaction forces in hydrocarbons. High bond-energy values for polar molecular clusters open up opportunities for alternative investigative approaches, including spectroscopic methods. The complex use of computer-added methods of analysis and spectroscopy can be very productive.

Author (s) Details

Boris Sedunov
Computer and Information Systems Department, Russian New University (ROSNOU) Moscow, Russia.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/371