Reversible vs Irreversible


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Theodore_Herring_1A
Posts: 60
Joined: Fri Sep 28, 2018 12:29 am

Reversible vs Irreversible

Postby Theodore_Herring_1A » Fri Feb 15, 2019 10:10 am

What is the best way to tell if a system is reversible or irreversible?

Faith Fredlund 1H
Posts: 68
Joined: Fri Sep 28, 2018 12:18 am

Re: Reversible vs Irreversible

Postby Faith Fredlund 1H » Fri Feb 15, 2019 10:35 am

Generally the question will deliberately state whether a system is reversible or irreversible.

For reversible systems:
w= -nRTln(V2/V1)
ΔS= q(rev)/ T @ a constant temperature
ΔS (where T1 --> T2) = nCln(T2/T1)

For irreversible systems:
w=-PΔV
ΔS= nRln(V2/V1)

Tarika Gujral 1K
Posts: 62
Joined: Fri Sep 28, 2018 12:27 am

Re: Reversible vs Irreversible

Postby Tarika Gujral 1K » Fri Feb 15, 2019 11:39 am

^^ Adding onto Faith’s answer:

For reversible, the question will also state that system is isothermal.

Also, Ssys is the same for irreversible and reversible work.
The only difference is Ssurr.

MackenziePerillo-1L
Posts: 31
Joined: Fri Sep 28, 2018 12:19 am

Re: Reversible vs Irreversible

Postby MackenziePerillo-1L » Sat Feb 16, 2019 12:55 pm

Is a reversible system always isothermal?

harshitasarambale4I
Posts: 58
Joined: Fri Sep 28, 2018 12:26 am

Re: Reversible vs Irreversible

Postby harshitasarambale4I » Sat Feb 16, 2019 4:40 pm

Also remember that irreversible processes have more entropy than reversible processes.


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