## Reversible

isochoric/isometric: $\Delta V = 0$
isothermal: $\Delta T = 0$
isobaric: $\Delta P = 0$

Tiffany Cao 1D
Posts: 94
Joined: Fri Sep 29, 2017 7:03 am
Been upvoted: 1 time

### Reversible

When a system is reversible, does that mean that only change in total entropy is 0? How about change in internal energy?

Wayland Leung
Posts: 51
Joined: Sat Jul 22, 2017 3:00 am
Been upvoted: 1 time

### Re: Reversible

When a system is reversible, it can be implied that the system is at equilibrium so yes the deltaS of the system would equal the negative deltaS of the surroundings.

Tiffany Cao 1D
Posts: 94
Joined: Fri Sep 29, 2017 7:03 am
Been upvoted: 1 time

### Re: Reversible

Is delta U also 0

Posts: 88
Joined: Fri Sep 29, 2017 7:03 am

### Re: Reversible

I believe if the process is isothermal, meaning there is no change in temperature, then the reversible system would have a delta U = 0.

OliviaShearin2E
Posts: 37
Joined: Fri Sep 29, 2017 7:05 am

### Re: Reversible

As well as what Adrian said, a process can have delta U = 0 even with a temperature change if the system returns to its original state, since U is a state function.