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aimLow

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dU=TdS−pdV

dU=dQ+dW

Does this imply, that the statement:

dU≤TdS−pdV

is wrong?

This is e.g. written in [

*Reichl, L. 2016, Modern Course in Statistical Physics*]). Reichl says that "The equality holds for reversible changes, and the inequality holds for changes which are spontaneous."