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Re: ENERGY WITH Q



At 09:54 AM 10/28/01 -0700, John Mallinckrodt wrote:
Any energy change in a system that is associated exclusively with
an alteration in the energy levels (rather than the occupation
numbers) of the allowed quantum states will *not* alter the entropy
of the system and ought, therefore, to be considered "work."

OK.

Any energy change in a system that is associated exclusively with
an alteration in the occupation numbers (rather than the energy
levels) of the allowed quantum states *will* alter the entropy
of the system and ought, therefore, to be considered "heat."

I don't get it.

How are we going to change the entropy without changing the energy (at any
nonzero temperature)?