Van der Weals excluded-volume model of multicomponent hadron gas

A generalization of the Van der Waals excluded-volume procedure for the mul ticomponent hadron gas is proposed. The derivation is based on the grand ca nonical partition function for the system of particles of several species i nteracting by hard-core potentials. The obtained formulae for thermodynamic al quantities are consistent with underlying principles of statistical mech anics as well as with thermodynamical identities. The model can be applied to the analysis of experimental data for particle number ratios in relativi stic nucleus-nucleus collisions.