A new equation of state (EoS), named H L , supported by a Boltzmann EoS type and based on physical intermolecular potential of gas components, is presented. This EoS, used in THOR code, takes α=13.5 to the exponent of the intermolecular potential and θ=1.4 to the adimensional temperature. It allows the calculation of thermodynamical properties and final compositions of gas and solid species, at adiabatic isobar and isochor combustion conditions (deflagration) and at Chapman-Jouguet detonation regimes, as a function of the initial composition of energetic system. Its validation has been done, initially, correlating the calculations of detonation of gaseous mixtures to experimental results. Predictions of detonation properties of condensed energetic materials give results in good correlation with experimental values. Deviation is more important in nitroaromatic compounds than in nitramines. Predicted values of detonation velocity show similar results independently of H/NO 2 and H(CH 2 )/NO 2 ratios of energetic molecules.