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Re: Fw: Why work before energy in texts



At 07:44 AM 10/24/01 -0500, Tom Wayburn wrote:
the basic idea is correct W "carries" no entropy) whereas Q "carries" entropy.

It is OK to talk about W when nonthermal energy transfer is the only thing
going on.

It is OK to talk about Q when purely thermal energy transfer is the only
thing going on.

Trying to separate the more-general energy transfer into a W piece and a Q
piece is a really bad idea, especially when dissipation is involved, for
reasons discussed at
http://www.monmouth.com/~jsd/physics/thermo-laws.htm#sec-thermal

Heat and work happen at the boundary of the control surface;

This attempted redefinition of "work" is inconsistent with the correct (F
dot ds) definition of work. Redefining it would be a really bad idea, for
reasons discussed at
http://www.monmouth.com/~jsd/physics/thermo-laws.htm#sec-eschew-w+q