4 papers
Irreversibility of sudden processes: Compression versus expansion in perfect gases
Andrés Vallejo, Matías Osorio
We focus on the study of the processes undergone by a perfect gas when the external pressure is suddenly modified. The analysis shows that, from the second law perspective, there i…
Which is greater: or ? An unorthodox solution to a classic puzzle
Andrés Vallejo, Italo Bove
The question of the title is a famous puzzle in the field of recreational mathematics, and can be addressed by several approaches. A compilation of solutions, some of them very ing…
A diagrammatic representation of entropy production
Andrés Vallejo
We introduce a natural way of visualizing the entropy production in heat transfer processes between a system and a thermal reservoir. This representation is particularly useful to…
Finding and improving bounds of real functions by thermodynamic arguments
Andrés Vallejo
The possibility of stating the second law of thermodynamics in terms of the increasing behaviour of a physical property establishes a connection between that branch of physics and…