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Re: ENERGY WITH Q PLEASE VOTE



Could someone give an accounting for the following two scenarios?

1. A box has two parts of equal volumes. One compartment is empty (vacuum).
By turning a small number, the gas in the other compartment is allowed to
expand into the empty compartment.

What is W?
What is Q?
What is deltaE?
What is deltaT?

2. The box is then raised a height H.

What is W?
What is Q?
What is deltaE?
What is deltaT?

Am I correct that all of these are zero?

--------------------------------------------
Robert Cohen rcohen@po-box.esu.edu
570-422-3428 http://www.esu.edu/~bbq
Department of Physics
East Stroudsburg University
East Stroudsburg, PA 18301
--------------------------------------------

-----Original Message-----
From: Bob Sciamanda [mailto:trebor@VELOCITY.NET]
Sent: Monday, November 12, 2001 2:37 PM

Consider that the free expansion (into a vacuum compartment ) of an
isolated gas involves an entropy change with zero "working "
or heating"
from the outside. The state has changed, and so has the
entropy, with no
possible correlation to any "working" on the system.

Entropy is determined by the system state. Conventially, Working and
Heating refer to
the history of specific processes which (among many other "equivalent"
possibilities) led to that state.