Is it true that thermodynamics still treats the motion of particles as deterministic, just not feasible to model that way?
Mostly whats in the title, I have always viewed thermodynamics under the lens that if it were possible to describe the system totally, from start to end, an identical system would be identical at any point in time to another system under the same conditions.
Meaning that regardless of the number of particles, most of thermodynamics still assumes that the changes occurring within a system are governed by some (incomprehensibly complex) multi particle interaction.
Is this, at least generally, the correct interpretation? That thermodynamics, as it was initially formulated, still assumes that the movement of particles within the system is completely deterministic, and that all the statistics used is necessary because it simply is not possible to solve or even write out the trajectories of n particles?