This chapter adopts the Chapman-Jouguet approach to derive jump conditions across combustion waves propagating in Van der Waals and Noble-Abel gases. The steady one-dimensional balance equations of mass, momentum and energy, assuming different properties of reactants and products, are applied to obtain the main properties of combustion waves, including velocities, Mach numbers, pressures and temperatures, in terms of the covolumes and intermolecular force parameters. In general, the effects of covolumes are more significant than the effects of the intermolecular attraction forces on Hugoniot curves and on properties of combustion waves. However, theoretical results using the Van der Waals equation of state matched more closely the experimental results for detonations of mixtures of propane and diluted air at high initial pressures.