Wilhelm Ostwald
Friedrich Wilhelm Ostwald (Latvian: Vilhelms Ostvalds; 2 September 1853 – 4 April 1932) was a Baltic German chemist. He received the Nobel Prize in Chemistry in 1909 for his work on catalysis, chemical equilibria and reaction velocities. Ostwald, Jacobus Henricus van 't Hoff, and Svante Arrhenius are usually credited with being the modern founders of the field of physical chemistry.