How are these 2nd Law equations related to each other?

Sometimes it can be useful to be reminded about the ways in which the various 2nd law equations are interrelated. Here is an outline of my picture of the situation. Other versions of this are of course possible. I just wanted to get my own grip on the logic which links them. It’s worth remembering that the 2nd law is an observation (ie it’s not proved using axioms, despite the earnest hopes of certain physicists).

seclawuni order2

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