Re: [Phys-l] PV question

[Bernard Cleyet <bernardcleyet@redshift.com>]

In the cooler / heater, but not in the cylinder, no?

bc

p.s.  the v. large # of reservoirs, I think, only a "gedanken", while the heater and, or cooler is practical.

On 2010, Jan 23, , at 12:29, John Mallinckrodt wrote:

> Bernard Cleyet wrote:
>
> > A PID controller with a heater or cooler of a single reservoir  
> > won't do?
> >
> > John Mallinckrodt wrote:
> >
> > > (e.g.,  an isobaric or isochoric process), you will need a large  
> > > number (technically, an infinite number) of reservoirs at  
> > > different temperatures.
>
> That could work to perform a reasonable approximation of a quasi- 
> static process on the gas, but it wouldn't constitute even an attempt  
> to perform a reversible process because heaters and coolers generate  
> entropy by design.
>
> John Mallinckrodt
> Cal Poly Pomona
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