Monday, December 17, 2018

thermodynamics - Why does Truesdell think entropy is an undefined object?


Truesdell explains in his essay of 1966, “Method and taste in natural philosophy” (C. Truesdell, Six Lectures on Modern Natural Philosophy, Springer-Verlag, Berlin, 1966.):


As mechanics is the science of motions and forces, so thermodynamics is the science of forces and entropy. What is entropy? Heads have split for a century trying to define entropy in terms of other things. Entropy, like force, is an undefined object, and if you try to define it, you will suffer the same fate as the force-definers of the seventeenth and eighteenth centuries: Either you will get something too special or you will run around in a circle.


I cannot find his book for less than about $90 so I was just wondering if anyone could explain a little bit further why he thinks that?




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