q and w in a reversible process


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Shrita Pendekanti 4B
Posts: 22
Joined: Fri Sep 25, 2015 3:00 am

q and w in a reversible process

Postby Shrita Pendekanti 4B » Thu Jan 28, 2016 6:38 pm

Does q necessarily equal -w in a reversible process?

Trixie Le 3K
Posts: 14
Joined: Thu Oct 08, 2015 3:00 am

Re: q and w in a reversible process

Postby Trixie Le 3K » Thu Jan 28, 2016 8:05 pm

No, not necessarily. q = -w when it is an isothermal reversible process because the change in internal energy of an isothermal reversible process is 0 and (change in internal energy) = q +w and if q + w =0 then therefore you can transform the equation into q=-w because the temperature and internal energy has no change, so if reversible expansion happens by work, then heat must be inputted into the system to be canceled out and have 0 change of internal energy.


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