Related Experiment Video
Updated: Nov 17, 2025

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
Published on: July 5, 2024
Comment on "Validity of path thermodynamics in reactive systems"
1Center for Nonlinear Phenomena and Complex Systems and Université Libre de Bruxelles (U.L.B.), Code Postal 231, Campus Plaine, B-1050 Brussels, Belgium.
This study refutes claims that entropy production calculations are flawed in complex chemical systems. We demonstrate correct entropy evaluation using path probabilities in reactive systems with multiple elementary reactions.
Area of Science:
- Chemical thermodynamics
- Statistical mechanics
- Physical chemistry
Background:
- The stochastic formulation of chemical thermodynamics is crucial for understanding reactive systems.
- Accurate calculation of entropy production is fundamental in physical chemistry.
- Previous work by Malek Mansour and Garcia raised questions about entropy evaluation in complex reactive systems.
Purpose of the Study:
- To refute the misconceptions presented in a previous study regarding entropy production calculations.
- To demonstrate the validity of using path probabilities for entropy evaluation in reactive systems with multiple elementary reactions.
- To clarify the correct application of stochastic thermodynamics in chemical systems.
Main Methods:
- Analysis of stochastic thermodynamics principles.
- Theoretical evaluation of path probabilities in reactive systems.
- Counter-argumentation of erroneous claims regarding entropy production.
Main Results:
- The claims by Malek Mansour and Garcia are based on fundamental misunderstandings of stochastic thermodynamics.
- Entropy production can be correctly evaluated using path probabilities even in systems with multiple elementary reactions yielding identical composition changes.
- The study provides a clear refutation of the previously asserted limitations.
Conclusions:
- The stochastic formulation of chemical thermodynamics is robust for analyzing reactive systems.
- Path probabilities offer a valid method for calculating entropy production in complex chemical reactions.
- Misconceptions regarding entropy production in reactive systems are addressed and corrected.
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...

