On the application of statistical physics for the description of nonequilibrium effects in chemical systems

In this paper we show how the methods of statistical physics may be applied to describe the nonequilibrium effects in systems with thermally activated reactions. A special attention is given to systems with multiple reactions, in which such effects are more important then in systems with a single reaction. Considering a model reaction scheme we demonstrate that a simple phenomenology, which associates different temperatures to different reagents, gives an accurate description of the nonequilibrium effects.