Reversible Path (Entropy)

[Title: REVERSIBLE PATH] [Verse] Heat flows slowly, step by step Along a path we control Take it gently, no loss inside Every change can be reversed [Chorus] dS equals dq rev over T That is the definition Follow the reversible path Entropy is well defined [Verse] Not the heat you measure fast Only the reversible way Different paths can give different q But S depends on state [Chorus] dS equals dq rev over T That is the definition Follow the reversible path Entropy is well defined [Bridge] Divide by temperature Each step along the way Add it up through the path State function remains [Final Chorus] dS equals dq rev over T That is the definition Follow the reversible path Entropy is well defined