Re: CONSERVATION OF ENERGY

[John Mallinckrodt <ajmallinckro@CSUPomona.Edu>]

A writes:

> John Mallinckrodt writes:
>
> > We need to 
> > distinguish between reversible and irreversible heating.  Both are what 
> > I would call "thermal" processes but only the second kind involves 
> > "temperature differences."  Yes, a little picky. 
>
> Yeah, because an infinitesuimal temperature difference is still 
> a temperature difference (as shown by nonstandard analysis).   
> Infinitesimals work.

Ah, but because you read what I *actually* wrote rather than what 
I *meant* to write, you have misunderstood me.  (I hate it when 
that happens.) I *meant* to say "only the *first* kind involves 
"temperature differences" since, in "irreversible heating," the 
interface separates regions that have *no* defined temperature 
and, thus, no temperature *difference.*

John
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