  Entropy is a quantity which is of great importance in physics and chemistry.
The concept comes out of thermodynamics, proposed by Rudolf Clausius in his
analysis of Carnot cycle and linked by Ludwig Boltzmann to the number of
specific ways in which a physical system may be arranged. Any physics
classroom, in its task of learning physics, has therefore to face this crucial
concept. As we will show in this paper, the lectures can be enriched by
discussing dimensional equations linked to the entropy of some physical
systems.
