  We resort to the methods of statistical mechanics in order to determine the
effects that a deformed dispersion relation has upon the thermodynamics of a
photon gas. The ensuing modifications to the density of states, partition
function, pressure, internal energy, entropy, and specific heat are calculated.
It will be shown that the breakdown of Lorentz invariance can be interpreted as
a repulsive interaction, among the photons. Additionally, it will be proved
that the presence of a deformed dispersion relation entails an increase in the
entropy of the system. In other words, as a consequence of the loss of the
aforementioned symmetry the number of microstates available to the
corresponding equilibrium state grows.
