Every year since the 90's I come back to some of my pet topics in physics, like statistical physics.(adsbygoogle = window.adsbygoogle || []).push({});

This time it was the reading of a Wikipedia article on entropy that surprised me.

The derivation of the second law from the Gibbs entropy was unknown to me.

I didn't know how heat, how change of internal energy, and how work can be identified from the equations below:

or

Not only is this derivation very simple but it also clarifies the meaning of heat and work from a statistical point of view.

I would like to know:

- if you were aware of this argument

- when/how you learned it

- how far it could be traced back in time (Gibbs maybe)

- if you know other references that mention this argument and discuss it further

Thanks to share

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# I Surprise? Entropy changes for systems in a canonical state

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