A Direct Road to Entropy and the Second Law of Thermodynamics

TL;DR

This paper reviews the logical derivation of entropy in classical thermodynamics, emphasizing its unique determination through adiabatic accessibility between equilibrium states and discussing related challenges.

Contribution

It provides a clear, logical pathway to understanding entropy's unique determination in thermodynamics, highlighting foundational challenges.

Findings

Entropy is uniquely determined by adiabatic accessibility.

The review clarifies the logical steps leading to this result.

It discusses the main challenges faced in establishing these foundations.

Abstract

The entropy of classical thermodynamics is uniquely determined by the relation of adiabatical accessibilty between equilibrium states of thermodynamical systems. This review outlines the logical path leading to this results and the challenges that have to be faced on the way.