Title:  On Certain Convex Sets of Measures and on Phases of Reacting Mixtures.

Abstract:  In the 1970's, Walter Noll developed a modern version of the elements of Gibbsian thermostatics for describing the equilibrium of mixtures. In this talk, we will see how we can use mathematical tools to explain why Gibbs said "it does not seem probable that r can ever exceed n+2" where n stands for number of components in a mixture and r stands for the number of coexistent phases. We will also exploit some other properties of a mixture when a it is in equilibrium.