Entropy in an irreversible process

[supermesh]

Can entropy change be zero for a closed system in an irreversible process? If yes under what conditions? Thanks!

 

[supermesh]

Is it true that entropy change for the irreversible process would be zero for an adiabatic process carried out in constant temperature?

 

[jaap de vries]

No!
Adiabatic means no heat transfer. The fact that the process is irreversible means that there is still entropy generated however this is now due to friction or other irreversible effects

 

[engware]

Hi there:

For an irreversible process, entropy change is always greater than zero.

It means that work needs to be provided in order to get the system back to its initial conditions.

By definition, entropy generation/increase/change is a measure of irreveribility ...

Thanks,

Gordan