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Re: Entropy and states of matter



On 26 Feb 2002, at 18:31, Jim Green wrote:


As the gas condenses negative work is done on the molecules
and hence their energy level decreases and so does the entropy of the
condensate.

The whole trouble is all of us including students know only of two
situations. One is we do not do any work.( This is the preferred
state sought by everybody). The second is doing some positive
work. (This option is usually out of favor).

But none of us know how to do negative work on something.
Hence the conceptual problems.

regards,

Sarma.

Jim Green
mailto:JMGreen@sisna.com
http://users.sisna.com/jmgreen