In the entropy equation 1S2 + ∫δQ/T = S2 - S1, what is the difference between 1S2 and ∫δQ/T?
So for example if we have two reservoirs, one hot and one cold and heat is transferred in between we have:
Shot = Q/Thot
Scold = Q/Tcold
Where do the Shot and Scold terms go in that equation?