On mixtures of relativistic fluids

A relativistic thermodynamic theory is presented for chemically reacting simple mixtures in which each consistuent has its own temperature. The field equation for particle numbers, velocities and temperatures are restricted by a general entropy principle and the principle of special relativity. It is shown how absolute temperatures for each constituent can be defined and that heat fluxes and production densities of energy-momentum are related to the gradients of temperatures and densities. The paper closes with a comparison of this theory with that of Eckart for the case of a single fluid. (Auth.)