An Advanced Platform for Thermodynamics Education. Part one: Small Density Pure Real Gases

Abstract

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. 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 clusters are considered now as a new state of matter. To study them is both challenging and educative. We use a wonderful feature of pure real gases: the chemical potential for all basic particles in a gas is universal for all clusters. It permits us to find the monomer fraction density Dm from an experimental pressure dependence of the total density. This variable has proven to be the key to properties of clusters and molecular interactions. The advanced platform is more informative for thermodynamics education than the widely used ideal gas model, which ignores molecular interactions. It provides a new vision of molecular interactions in clusters and the entropy in pure real gases. Moving step-by-step from ideal to denser gases students may better understand the complex nature of condensation. Here we start from small density gases.

An Advanced Platform for Thermodynamics Education. Part two: Monomer Quantum Volume in Pure Fluides

“…The pure fluids' quantum uncertainty features cognition is based on the next terms and variables [1]:…”

“…The monomer fraction density Dm seems to be much more understandable for students than the fugacity f, which can be defined as the Monomer fraction partial pressure Pm [1].…”

“…With the pure fluids based educational platform [1] we will here study the quantum effects in the thermodynamics of these fluids utilizing the molar Gibbs energy G, named also as the chemical potential for their basic particles.…”

“…Pure fluids present an advanced platform for thermodynamics education and research [1] and provide the next step from the widely used simplified classical fluid model, which ignores the quantum uncertainties, being essential factors for the fluids. The quantum uncertainty volume is larger than the own particles' volume in the quantum fluid and smaller than the own particles' volume in others atomic and molecular fluids.…”