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The reasons are that: 1) As we know, Variational Calculus is about Functional, however, here, we have known Q=f(T, V, P), Q=f(T, V, P) is a normal function, if you think δQ as the variation,...
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Please notice that , in thermodynamics, when we're discussing "process" or "cycle", we're discussing a process or a cycle of a specific path(trajectory). The arbitrary cycle that a set of...
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Physics paper Entropy:A concept that is not a physical quantity Published in (SCI-E Journal) PHYSICS ESSAYS (Volume 25, Issue 2 (June 2012)). URL: http://physicsessays.org/toc/phes/25/2...
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