VJ-23X: "We both know entropy can't be reversed. You can't turn smoke and ash back into a tree."
MQ-17J: "Do you have trees on your world?"
- Isaac Asimov ("The Last Question")
The Second law of Thermodynamics in terms of heat engines (practical definition).
Definition of entropy. Change in entropy during phase changes.
Entropy change while reaching thermal equilibrium.
Reversible and irreversible processes.
Molecular view - statistical thermodynamics. Thermodynamic and statistical (logical) entropy.
Entropy as a measure of disorder in a system. The Second Law of Thermodynamics in terms of entropy (theoretical definition).