Here’s a explanation:
Reversible Process
- Happens very slowly and perfectly balanced.
- Entropy change of the universe: zero
- Everything can go back to the original state without leaving any “disorder.”
Irreversible Process
- Happens naturally, usually with friction, mixing, or heat loss.
- Entropy change of the universe: always increases
- Some “disorder” is created and the process cannot fully reverse.
Easy way to remember:
- Reversible → no extra disorder
- Irreversible → disorder always increases