Timeline for Entropy as extractable useful work vs. statistical entropy
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 5, 2022 at 13:04 | comment | added | Themis | You are right of course. These are important conditions but they distract from the bigger discussion, given that the OP indicated no background in thermodynamics. | |
| Nov 4, 2022 at 22:05 | comment | added | hyportnex | For details see the exceptionally clearly written Chapter V pp77-80 in "Thermodynamics" by Enrico Fermi (yes, that one) and do not miss the footnote on p79 archive.org/details/thermodynamics0000ferm/mode/2up, and I should have said above that as "implied" not as "stated". | |
| Nov 4, 2022 at 21:59 | comment | added | hyportnex | As stated that $F(T)=E-TS$ is the maximum amount of work that can be extracted is incorrect. It is correct to say that if a system exchanges thermal energy with a heat reservoir that is at temperature $T_r$ then the extractable work $W$ can never exceed $F(T_r) = E-T_rS$. Or even better and more generally: if the system can only exchange heat with a reservoir at $T_r$ and is moved between two states so that the initial and final states are at the same temperature $T_r$ then the maximum extractable work is $\Delta F = F(init) - F(final)$ | |
| Nov 4, 2022 at 21:11 | vote | accept | feltshire | ||
| Nov 4, 2022 at 10:39 | history | answered | Themis | CC BY-SA 4.0 |