Entropy is a redundant concept. Saying that a process increases entropy is just saying that the end state is more probable than the start one.
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Among other things, that it will take work to remove that disorder.
It takes work to go from a more probable state to a less probable one. So entropy is still a redundant concept.
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There's also the issue of why certain states are more probable. And the meaning of entropy varies somewhat between disciplines, I believe. Lots of meat there.
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Lectures on entropy introduce a distinction of microstates and macrostates, microstates being configurations that are different but macroscopically equivalent that can't be observed directly.A macrostate is more probabl than another if there are more microstates that implement it
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It takes energy to change the state of a system, not necessarily work. Ex: if you compress+decompress a gas inside an adiabatic container it won't return to its initial state when the volume is the again initial volume, because you introduced mechanically irreversible energy.
Kiitos. Käytämme tätä aikajanasi parantamiseen. KumoaKumoa
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In this case, (initial and final volumes equal; compression and decompression done one of many possible ways) entropy measures a difference in internal energy that has been introduced by a temporary variation of volume. Entropy is necessary for a macro description of state.
Kiitos. Käytämme tätä aikajanasi parantamiseen. KumoaKumoa
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The best paper I know about this:https://www.researchgate.net/publication/236983908_Introducing_thermodynamics_through_energy_and_entropy …
Kiitos. Käytämme tätä aikajanasi parantamiseen. KumoaKumoa
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