  The theory of phenomenological Non-equilibrium Thermodynamics is extended by
includimg stochastic processes in order to account for recently derived
thermodynamical relations such as the Jarzynski equality. Four phenomenological
axioms are postulated resulting in a phenomenological interpretation of
Jarzynski's equality. Especially, considering the class of Jarzynski processes
Jarzynski's equality follows from the axiom that the statistical average of the
exponential work is protocol independent.
