## Reversible vs Irreversible

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

Angela Wu-2H
Posts: 50
Joined: Fri Aug 30, 2019 12:16 am

### Reversible vs Irreversible

Why does it matter if a system is reversible or irreversible? Does it change the formulas utilized?

Bryce Barbee
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

### Re: Reversible vs Irreversible

I think with entropy it matters because one of the formulas only uses heat (reversible) divided by temperature.

Sjeffrey_1C
Posts: 108
Joined: Wed Feb 20, 2019 12:17 am

### Re: Reversible vs Irreversible

You use different formulas depending if it is reversible or irreversible.

Reversible: work = -nRT ln (v1/v2)

Irreversible: work = -Pext ΔV

805383532
Posts: 53
Joined: Thu Jul 11, 2019 12:16 am

### Re: Reversible vs Irreversible

When a system is reversible, dStotal = dSsystem + dSsurroundings is equal to 0.

805329408
Posts: 49
Joined: Wed Nov 20, 2019 12:21 am

### Re: Reversible vs Irreversible

For a reversible system, the system is isothermal and thus temperature is constant which impacts the formulas utilized since some are used for temperature change and some are used when temperature is constant which is the case of a isothermal, reversible system.

Michelle N - 2C
Posts: 117
Joined: Wed Sep 18, 2019 12:19 am

### Re: Reversible vs Irreversible

805329408 wrote:For a reversible system, the system is isothermal and thus temperature is constant which impacts the formulas utilized since some are used for temperature change and some are used when temperature is constant which is the case of a isothermal, reversible system.

Can you or someone here explain what equations can be used for reversible reactions and for irreversible reactions? Can some be used by both?

Abigail_Hagen2G
Posts: 107
Joined: Fri Aug 09, 2019 12:17 am

### Re: Reversible vs Irreversible

Yes, there are different equations to use based on if it's reversible or irreversible.

Emil Velasco 1H
Posts: 96
Joined: Wed Nov 21, 2018 12:19 am

### Re: Reversible vs Irreversible

It's also important to note that reversible does the most amount of work.