Is entropy extensive?

Posted by on Dec 28, 2012 in Science | 0 comments

There is a very general theme in modern physics instruction to the effect that the originators of statistical mechanics got the expressions for entropy wrong, in that they were not extensive. It’s often pointed out that Gibbs was among the first to correct Boltzmann’s original statistical expression for entropy, in order to make it extensive, as a consequence of noting what’s referred to as Gibb’s paradox. The Wikipedia article on Gibb’s paradox, just linked to, illustrates the issue by supposing two equal volumes of a similar ideal gas separated by a removable...

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