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Anonymous at Mon, 8 Jul 2024 11:56:02 UTC No. 16272716
How are they different? I just don't get it.
I failed thermodynamics 10 times already, twice per year. I passed now all of the courses in my physics degree but thermodynamics. This shit just makes no sense man
Anonymous at Mon, 8 Jul 2024 12:00:29 UTC No. 16272719
>>16272716
internal energy - there's a certain amount of this in all matter because all matter has internal degrees of freedom in which to store energy
enthalpy - when that energy is released through only the internal degrees of freedom (heat)
helmholtz and gibbs energies - when that energy is released and the system is allowed to perform work on its enviornment. if the system can perform work (i.e. it can push against the enviornment) you have gibb's free energy. when the system cannot perform the work but tries (i.e. it pushes against an inflexible barrier) you have the helmholtz free energy.
Anonymous at Mon, 8 Jul 2024 12:00:31 UTC No. 16272720
>>16272716
>Gibbs free energy
we work for our energy around here. get off your ass.
Anonymous at Mon, 8 Jul 2024 12:07:00 UTC No. 16272724
>>16272716
Chemists are brainlets and need fiffeen names for different applications of energy conservation. They talk about Gays Law, Boyles Law, Charles Law. None of them understand it's just the ideal gas law
Anonymous at Mon, 8 Jul 2024 12:10:00 UTC No. 16272725
>>16272724
>None of them understand it's just the ideal gas law
its cuz it fuckin works
Anonymous at Mon, 8 Jul 2024 12:23:53 UTC No. 16272731
>>16272725
Some day maybe you'll understand
Anonymous at Mon, 8 Jul 2024 12:30:59 UTC No. 16272733
they differ by which environmental condition stays constant.
ask gpt4 honestly, it's a good tutor.
Anonymous at Tue, 9 Jul 2024 17:36:27 UTC No. 16274473
>>16272716
Enthalpy is basically internal energy + pressure-volume work if I recall correctly.
Helmholtz is defined for isochoric-isotermic process (no change of temp and VOLUME).
Gibbs is defined for isobaric-isotermic process (no change in temp and PRESSURE).
Anonymous at Tue, 9 Jul 2024 17:54:46 UTC No. 16274523
>>16272720
Kek
Anonymous at Tue, 9 Jul 2024 17:56:42 UTC No. 16274532
>>16272716
>he doesn't know about the MIT lectures on thermo
yeah no wonder why
https://ocw.mit.edu/courses/5-60-th
Anonymous at Tue, 9 Jul 2024 18:56:08 UTC No. 16274670
Magician needs to invoke a rabbit.
Rabbit has internal energy U
But you have to make room for it in atmosphere thus PV
But you get heat from atmosphere thus TS
Anonymous at Wed, 10 Jul 2024 18:22:02 UTC No. 16276286
>>16274670
Schroeder?
Anonymous at Wed, 10 Jul 2024 18:38:32 UTC No. 16276307
>>16272716
Gonna add my own
+U (internal energy): Energy inside a box (simple to understand). Ideally, one might be able to convert all of it into work (not quite...)
+PV: If you remove the contents of a box, suddenly the atmosphere outside of the box is going to collapse to fill the box's void. When it collapses, you can extract work from it. This work doesn't come from the original internal energy.
-TS: Turns out not all the internal energy can be converted to usable work. Damn