Re: ENERGY WITH Q

[kowalskil <kowalskil@MAIL.MONTCLAIR.EDU>]

Referring to this:

> > In many textbooks thermal energy, which is really
> > mechanical energy of randomly agitated molecules
> > and atoms, is referred to as internal energy. In my
> > opinion this term is not desirable because "internal"
> > could easily be misinterpreted as "all energy inside
> > a system". This would be wrong, some energy inside a
> > system can be nonthermal. Think about a system
> > containing compressed springs and rotating wheels.

Jim Green wrote:

> Well, Ludwik, there is motion "inside" a usual thermodynamic system which
> should be distinguished from the motion which causes pressure.  Call it
> what you like, but the physics of the linear motion is different from that
> of the rotational and vibrational motion even in a very simple system.  The
> possible presence of pulleys and wheels inside the system are ignored here.

Are you saying that only translational motion of
molecules contributes to Eth? I would not say so.
I think that vibrational motion, when it exists,
does contribute to hight P at highr T. Is it not
true that thermal expansion of solids is a
manifestation of this?
Ludwik Kowalski