This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
I have added a new derivation of the relation between the microscopic and thermodynamic definition. I feel this one is more straightforward and less confusing. Feel free to check it for mistakes. JanJaeken (talk) 14:05, 13 September 2012 (UTC)