Re: multi-step reasoning

[Herbert H Gottlieb <herbgottlieb@JUNO.COM>]

On Wed, 21 Aug 2002 16:32:25 -0500 Joseph Bellina
<jbellina@SAINTMARYS.EDU> writes:
> With all do respect, zero pressure does not exist, and zero pressure
> difference is not zero pressure...I can't think of a case in which
> changing the volume doesn't involve work being done.
>
> cheers

How about this case???
Two hollow metal containers of equal size are connected by a pipe
containing a valve in the closed position.  One of the containers
contains a gas at atmospheric pressure and the other container
contains a vacuum.

When the valve between the containers is opened, the volume
of the gas is doubled. Is work being done in this instance??

Herb