  Calorimetric measurements are experimentally realizable methods to assess
thermodynamics relations in quantum devices. With this motivation in mind, we
consider a resonant level coupled to a Fermion reservoir. We consider a
transient process, in which the interaction between the level and the reservoir
is initially switched on and then switched off again. We find the time
dependence of the energy of the reservoir, of the energy of the level and of
the interaction energy between them at weak, intermediate, strong and
ultra-strong coupling. We also determine the statistical distributions of these
energies.
