Isothermal expansion

isochoric/isometric:
isothermal:
isobaric:

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Anuk Burli 2C
Posts: 29
Joined: Fri Sep 26, 2014 2:02 pm

Isothermal expansion

Postby Anuk Burli 2C » Sun Jan 25, 2015 9:51 pm

Are isothermal processes always reversible? If the question doesn't specify if the process is reversible but it says it's isothermal do we assume that it's reversible?

martha-1I
Posts: 76
Joined: Fri Sep 26, 2014 2:02 pm

Re: Isothermal expansion

Postby martha-1I » Sun Jan 25, 2015 11:02 pm

I would assume a process is reversible if it was stated to be isothermal since I have noticed from doing the homework problems that they can be interchangeable.

Chem_Mod
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Re: Isothermal expansion

Postby Chem_Mod » Tue Jan 27, 2015 4:17 pm

State functions will be the same whether reversible or not, since a state function is independent of the process. However, q and w will not be the same.

Take a look at the two P-V diagrams at the back of the Thermo section in the course reader, which compare reversible and irreversible isothermal processes. In particular, the work (area under the curve) is much less for the irreversible process.


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