# Reversibility and Carnot cycle

1. Dec 10, 2007

### LTP

I have two short questions:

1) Is the Carnot cycle completely reversible?

2) $$\Delta S = 0$$ for a reversible process, right?

2. Dec 10, 2007

### vivesdn

Yes, the Carnot cycle is designed as being reversible.

Yes, it is the Clausius theorem for a reversible cycle. On a particular reversible process, a system can increase o decrease its entropy provided that the surroundings decrease or increase it by the same amount, as the universe entropy will remain constant.