  In this paper a thermodynamical derivation of the quantum potential is pro-
posed. Within the framework of Bohmian mechanics we show how the quantum
potential can be derived, by adding an additional informational degree of
freedom to the ordinary degrees of freedom of a physical system. Such a
derivation uses the First Law of thermodynamics for this additional degree of
freedom and basic equilibrium thermodynamics methods. By doing that, one may
associate a temper- ature to each wave function. Features and behavior of this
temperature in different situations is studied.
