Related Experiment Video
Updated: Dec 17, 2025

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
Published on: July 5, 2024
Validity of path thermodynamics in reactive systems
M Malek Mansour1, Alejandro L Garcia2
1Center for Nonlinear Phenomena and Complex Systems, Université Libre de Bruxelles CP 231, Campus Plaine, B-1050 Brussels, Belgium.
The path thermodynamic formulation for nonequilibrium reactive systems may yield results contradicting established thermodynamic laws. Mathematical analysis confirms these discrepancies in practical examples.
Area of Science:
- Thermodynamics
- Chemical Kinetics
- Physical Chemistry
Background:
- Nonequilibrium systems present unique thermodynamic challenges.
- Understanding reactive systems far from equilibrium is crucial for various scientific fields.
- Existing thermodynamic formulations may require re-evaluation for dynamic processes.
Purpose of the Study:
- To investigate the validity of the path thermodynamic formulation for nonequilibrium reactive systems.
- To identify potential contradictions between this formulation and established thermodynamic principles.
- To provide mathematical rigor to the observed discrepancies.
Main Methods:
- Application of the path thermodynamic formulation to simple, practical nonequilibrium reactive systems.
- Detailed mathematical analysis of the formulation's predictions.
- Comparison of theoretical results with known thermodynamic properties.
Main Results:
- The path thermodynamic formulation produced results inconsistent with fundamental thermodynamic properties.
- Simple examples demonstrated the potential for the formulation to violate established laws.
- Rigorous mathematical proofs confirmed the contradictions.
Conclusions:
- The path thermodynamic formulation, as applied, is not universally applicable to nonequilibrium reactive systems.
- This formulation may lead to thermodynamically inconsistent outcomes.
- Further refinement or alternative approaches are needed for accurate thermodynamic descriptions of such systems.
Related Concept Videos
Path Between Thermodynamics States
Entropy Change in Reversible Processes
The statement can be further generalized to prove that entropy is a state function. Take a cyclic process between any two points on a p-V diagram.
Second Law of Thermodynamics
Second Law of Thermodynamics
Thermodynamics: Chemical Potential and Activity
The thermodynamic equilibrium constant is more accurately defined in terms of activity rather than concentration.
Thermodynamics: Activity Coefficient
The activity coefficient is a measure of the deviation from ideal behavior. When the ionic strength of the solution is minimal, the activity coefficient of an ionic species is close to unity, making...

