nist webook water coefficient of thermal expansion

#Nist webook water coefficient of thermal expansion series#

The thermal analysis of precise thermophysical data for pure fluids from electronic databases is developed to investigate the molecular interaction mechanisms and parameters and the structural features of heterogeneities in fluids. The discovered mutually correlated anomalous temperature dependences of the pair bond energy and the constant volume heat capacity in gaseous Helium require a special investigation of this remarkable phenomenon. The found temperature dependences of the pair interaction bond energies signal about the hindered rotation of atoms in dimers near the triple point due to the lack of rotational symmetry of their electronic outer shells. In this work the temperature range for analysis of the dimers' bonding parameters is extended as compared to previous author's works due to accounting for the specific temperature dependence of the repulsions' contribution to the potential energy. To discover the important details and particular features of pair atomic interactions in noble gases, the preprocessed and generalized experimental data have been taken from the US National Institute of Standards and Technology (NIST) online database.

#Nist webook water coefficient of thermal expansion series#

The methodology of the analysis is based on the potential energy density series expansion by the monomer fraction density. The aim of this research is to apply the author's original computer aided analysis of thermophysical data for pure fluids to noble gases to investigate the unknown aspects in their equilibrium thermal physics. Moving step-by-step from ideal to denser gases students may better understand the complex nature of condensation. It provides a new vision of molecular interactions in clusters and the entropy in pure real gases. The advanced platform is more informative for thermodynamics education than the widely used ideal gas model, which ignores molecular interactions. This variable has proven to be the key to properties of clusters and molecular interactions. It permits us to find the monomer fraction density Dm from an experimental pressure dependence of the total density. We use a wonderful feature of pure real gases: the chemical potential for all basic particles in a gas is universal for all clusters. To study them is both challenging and educative. The clusters are considered now as a new state of matter. But in spite of a huge amount of extra precise experimental data, the nature of real gases and clusters in them is still poorly understood. The paper presents an advanced platform for thermodynamics education-the equilibrium pure real gas system, which has been deeply investigated experimentally and theoretically by researchers from all over the World. Keywords: Real gas atomic interaction cluster dimer bond energy equilibrium constant. The discovered anomalous densityĭependences of the constant volume heat capacity in gaseous Helium and Neon tell about unusualĪtomic interactions in clusters of these gases. Potential energy of the gas at elevated temperatures. The analysis accounts for the elastic repulsions’ contribution to the The directional bonding of atoms in clusters near the triple point due to the lack of rotational symmetry The found temperature dependences of the atomic interaction bond energies signal about For this analysis precise experimental thermophysicalĭata have been taken from the US National Institute of Standards and Technology (NIST) online The author applies hisĬomputer aided analysis of precise thermophysical data to atomic gases to demonstrate the unknownĪnd no trivial properties of clusters in them. Potential energy density series expansion by the monomer fraction density. The author's analysis is based on the gas It permits to find the monomer fraction density from anĮxperimental pressure dependence of the total density. The authorīases his research on a wonderful feature of pure real atomic gases: The universal basic particles'Ĭhemical potential for atoms in all clusters. Gas simplified model towards more realistic model accounting for the atomic interactions. Presents an advanced platform for thermodynamics education: It is the first step after the atomic ideal

The clusters are considered nowĪs a new state of matter. Many researchers, but the nature of clusters was poorly understood. The pure atomic gas system has been deeply investigated experimentally and theoretically by The chapter presents a review of the author's discovering in the cluster physics of equilibrium atomic