- #1
MatthewKM
- 11
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- TL;DR Summary
- Entropy, Brownian motion, volume vs temperature thought experiment
Entropy question.
Take a finite number of identical atoms in a specific volume of space at a moment of time.
Run two thought experiments on this system
scenarios (both time independent)
1: expand the volume of space of the system instantaneously by a factor of 10. The fixed number of atoms in the system have not, in that instant, yet reduced (or increased) their individual kinetic energies but the vacuum pressure has reduced in the system concordant with the increase in volume.
2: Instantaneously reduce the kinetic energy of all the atoms in the system uniformly without changing the volume of the system such that the total heat in this system is equal to scenario #1 concordant with Avogadro’s law
Are either of these two impossible scenarios both unique descriptions of entropy increasing according to the second law of thermodynamics or is entropy an entanglement of these two scenarios?
Take a finite number of identical atoms in a specific volume of space at a moment of time.
Run two thought experiments on this system
scenarios (both time independent)
1: expand the volume of space of the system instantaneously by a factor of 10. The fixed number of atoms in the system have not, in that instant, yet reduced (or increased) their individual kinetic energies but the vacuum pressure has reduced in the system concordant with the increase in volume.
2: Instantaneously reduce the kinetic energy of all the atoms in the system uniformly without changing the volume of the system such that the total heat in this system is equal to scenario #1 concordant with Avogadro’s law
Are either of these two impossible scenarios both unique descriptions of entropy increasing according to the second law of thermodynamics or is entropy an entanglement of these two scenarios?