FTP name this German physical chemist, whose heat theorem became synonymous with the Third Law of Thermodynamics.
In 1911, with his associate Lindemann, this scientist developed a special calorimeter to determine heat capacities at low temperatures, and had earlier patented an improved filament for light bulbs.  He made important contributions to the understanding of ionic hydration, electrochemical cells, and to the theory of buffer solutions, formulated a law of diffusion of electrolytes and another relating equilibrium concentrations of a solute distributed between immiscible liquid phases, the latter of which formed the basis for modern techniques of solvent extraction.  FTP name this German physical chemist, whose heat theorem became synonymous with the Third Law of Thermodynamics.
In 1911, with his associate Lindemann, this scientist developed a special calorimeter to determine heat capacities at low temperatures, and had earlier patented an improved filament for light bulbs.  
Hermann Walther Nernst