Giovanni Ciccotti
Department of Physics
University of Roma “La Sapienza”
Rome, Italy
The (only real) meaning of Entropy (and others Thermodynamical Potentials) in Statistical Mechanics is that of a probability measure from which all observable properties follow as either moments of that probability measure or reduced/marginal/conditional probabilities derived from it. On that basis we can discuss and clarify few misconceptions originated by approximate (more verbal than rigorous) definitions of Entropy (Entropy vs Order/Disorder).