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Re: [Phys-L] ?conservation of _internal_ energy




The books that glorify U tend to write things like
ΔU = heat + work
and assert that this expresses conservation of energy. I find
that very very odd, since in reality U is not conserved.


I see that as the definition oh heat


first principle is the existance of U as a state function



perhaps alonso finn book chapter system of particles could be usefull