Timeline for Is there a quasistatic process that is not reversible?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 18, 2016 at 17:19 | comment | added | user115350 | Sorry for my negligence; I took a sufficient condition in my answer though it is not necessary. Here I can make an example of a quasi-static process but not reversible: when we very slowly bend a steel bar till it yields, the process is quasi-static but irreversible. Breaking bond between molecules can generate a small amount of heat but also making it irreversible. | |
| Dec 14, 2016 at 17:31 | comment | added | user115350 | I was meant that reversible process has zero entropy change. I don't know why it is not true. | |
| Dec 14, 2016 at 17:04 | comment | added | march | @Dimitri. I agree with you here, except that probably what user115350 meant here is that the total change in entropy of the universe is zero. Sure, the systems in contact with each other during the process will likely have entropy changes, but for a reversible process, the net change in entropy of all the systems exchanging energy will necessarily be zero (pretty much be definition of reversible). | |
| Dec 13, 2016 at 10:14 | comment | added | Dimitri | A reversible process can have entropy change, this is precisely what you wrote with $\Delta S \neq 0$. And it is not true that an isothermal adiabatic process is necessarily reversible. | |
| Dec 8, 2016 at 17:51 | history | answered | user115350 | CC BY-SA 3.0 |