Lars Onsager was a Norwegian American physical chemist and theoretical physicist. He held the Gibbs Professorship of Theoretical Chemistry at Yale University. He was awarded the Nobel Prize in Chemistry in 1968. The Nobel Prize in Chemistry 1968, announced October 30, 1968. Lars Onsager, “for the discovery of the reciprocal relations bearing his name, which are fundamental for the thermodynamics of irreversible processes”. Lars Onsager: born 1903, Kristiania (now Oslo), Norway. Wiki link Data: the Nobel Foundation (CC0).