## irreversible v reversible

Karina Koo 2H
Posts: 49
Joined: Fri Sep 28, 2018 12:24 am

### irreversible v reversible

Why does S total increase with irreversible but not reversible?

Jaira_Murphy_2D
Posts: 31
Joined: Fri Apr 06, 2018 3:00 am

### Re: irreversible v reversible

yes, I think S tot for a reversible process is = to 0

josie 1C
Posts: 18
Joined: Fri Sep 28, 2018 12:19 am

### Re: irreversible v reversible

If it is a reversible process (and it goes back to the original state) the change in entropy is 0. Since it has returned to its original state, there is no overall change in entropy for reversible processes.

ChathuriGunasekera1D
Posts: 78
Joined: Fri Sep 28, 2018 12:17 am

### Re: irreversible v reversible

Hi! If it's a reversible process, you know that S has to change to something because the process cannot return to its original state.

005113695
Posts: 59
Joined: Fri Sep 28, 2018 12:15 am

### Re: irreversible v reversible

Since S is a state function, the path it takes doesn't matter, therefore if it returns to the original state, entropy is 0.

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