Timeline for Which Thermodynamic variables are averages?
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 23, 2020 at 9:29 | answer | added | GiorgioP-DoomsdayClockIsAt-90 | timeline score: 0 | |
| Jul 11, 2017 at 13:41 | comment | added | honeste_vivere | All thermodynamic variables are ensemble averages of distributions in some way or another. This is necessary to describe a macroscopic system (e.g., the temperature of the air you breathe in your current location) constructed from microscopic pieces (e.g., temperature would be the mean kinetic energy of the atoms/molecules in their bulk flow rest frame, i.e., derived from the second velocity moment). | |
| Jul 11, 2017 at 1:30 | vote | accept | CommunityBot | ||
| Jul 11, 2017 at 0:35 | answer | added | probably_someone | timeline score: 1 | |
| Jul 11, 2017 at 0:30 | comment | added | user92177 | Particles. I am pretty sure that the thermodynamic assumption is to assume ergodicity, so averaging over time and/or space is equivalent. | |
| Jul 11, 2017 at 0:28 | comment | added | probably_someone | Also, what are you averaging over here? Space? Time? | |
| Jul 11, 2017 at 0:18 | comment | added | user92177 | When you construct the statistical ensembles, you fix certain things. Like for the canonical one, you fix temperature, volume and particle number, and then you do the integrals to get the partition function. | |
| Jul 10, 2017 at 23:34 | comment | added | probably_someone | What does "fixed, in the statistical sense" mean? | |
| Jul 10, 2017 at 23:05 | history | asked | user92177 | CC BY-SA 3.0 |