Re: macroscopic vs microscopic degrees of freedom

[Bob Sciamanda <trebor@VELOCITY.NET>]

Except for the restriction to "two systems in contact", this (in my
reading) is the traditional identification of dQ. Note that it (also
traditionally) includes all three modes of heat transfer: conduction,
convection and radiation).

But as I have hitherto ventured, this "ratio divisionis" is not unique.
Other creative accounting methods (of energy balance) are possible and can
be correct.

Bob

Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
http://www.velocity.net/~trebor

----- Original Message -----
From: Joel Rauber <Joel_Rauber@SDSTATE.EDU>
To: <PHYS-L@lists.nau.edu>
Sent: Monday, November 01, 1999 10:16 AM
Subject: Re: macroscopic vs microscopic degrees of freedom


> dQ arises from that part of an energy transfer between two systems in
> contact(not to be viewed as a flow, but rather as an accounting
terminology)
> that occurs by virtue of a difference in temperature between the
systems.
> The transfer of energy that arises from any other means is dW; that is,
the
> complement to what is dQ.
>
> In the above, I'm assuming no transfer of matter between the two systems
in
> contact.
>
> Joel