Entropy anomaly and linear irreversible thermodynamics.

The irreversible currents and entropy production rate of a dilute colloidal suspension are calculated using linear irreversible thermodynamics and the linear response theory. The "anomalous" or "hidden" entropy that has been the subject of recent discussion in the context of stochastic thermodynamics is fully accounted for in these classical frameworks. We show that the two distinct formulations lead to identical results as long as the local equilibrium assumption, or equivalently, the linear response theory, is valid.