## entropy at equilibrium

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

SarahCoufal_1k
Posts: 102
Joined: Thu Jul 25, 2019 12:17 am

### entropy at equilibrium

Why is entropy a maximum at equilibrium. ( looking at the equation deltaS= q/T)

Isha_Maniyar_Dis2E
Posts: 110
Joined: Thu Jul 11, 2019 12:16 am

### Re: entropy at equilibrium

Entropy is a maximum at equilibrium because deltaS(system) = -deltaS(surroundings). At equilibrium, one side will gain all the possible entropy, while the other will lose it.

Hope this helped!

Miriam Villarreal 1J
Posts: 105
Joined: Sat Aug 17, 2019 12:16 am

### Re: entropy at equilibrium

In equilibrium, the entropy of the system cannot increase (because it is already at a maximum) and it cannot decrease (because that would violate the second law of thermodynamics).

Tiffany_Chen 2K
Posts: 106
Joined: Fri Aug 30, 2019 12:15 am

### Re: entropy at equilibrium

At equilibrium, deltaS(total)=0. Thus, deltaS(sys) will have the opposite relationship to deltaS(surr). Any entropy change will be the only entropy change to the system (as deltaS(surr) will only reflect the exact opposite of deltaS(sys)).