Thermodynamics of Gyula Farkas - a new (old) approach to entropy
2002
Caratheodory´s postulate system is regarded as a milestone in the history of
foundation of thermodynamics and as one of the most elegant constructions.
Entropy is introduced via the adiabatic inaccessibility postulate. The main
statement is the existence of an integrating factor for the heat element of
the first law independently of the number of variables.
The early history is nearly forgotten. Ideas leading to Caratheodory´s
principle have developed slowly from the very moment that Clausius proved
his famous integral formula. Gyula Farkas, a Hungarian physicist has already
in 1895 formulated a version of the adiabatic inaccessibility postulate.
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