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dU = Mdt = δQ - dH
Biology is “the study of those thermodynamic systems that can replace their internal energy”.
pdt + mdt = dh + du
Ecology is “the study of the exact processes by which a thermodynamic system replaces its internal energy”.
The Gibbs-Duhem equation:
m̅μ = m̅dS = dU + dH - Σi μi(dvi - dmi)
The Euler equation:
μ = dS = (∂S/∂U)V,Ni dU + (∂S/∂V)U,Ni dV +
Σi (∂S/∂ui)U,V,{Nj≠i} dui + Σi (∂S/∂vi)U,V,{Nj≠i} dvi.
The three constraints: constant propagation, P > 0 = ∫0T dP; constant size, R > 0 = ∫0T dR; constant equivalence, W > 0 = ∫0T dW.