## Stot

$\Delta S = \frac{q_{rev}}{T}$

chloewinnett1L
Posts: 55
Joined: Fri Sep 28, 2018 12:20 am

### Stot

What exactly is Stot? Is this a combination of the change in entropy of surroundings minus the change in entropy of the system? Furthermore, how can you use Stot to determine spontaneity?

Felicia1E
Posts: 31
Joined: Fri Sep 28, 2018 12:22 am

### Re: Stot

I believe deltaS total (aka S universe) is the deltaS surr plus deltaS sys. If deltaS total is positive, the process is spontaneous, if deltaS total is negative the reaction is non spontaneous, and if deltaS total is 0, the reaction is at equilibrium.