Heat flow through a finite temperature drop is an irreversible process. And during heat transfer in the Carnot cycle there must be no finite temperature difference.
Table of Content:
0:00 Carnot Cycle
1:32 Reversible Isothermal Expansion
3:19 Reversible Adiabatic Expansion
4:50 Reversible Isothermal Compression
6:03 Reversible Adiabatic Compression
![](https://i.ytimg.com/vi/BKwtQmgGu6I/maxresdefault.jpg)