Global and local properties of mixtures: An expanded paradigm for the study of mixtures

Traditionally, the properties of liquid mixtures were studies in terms of excess thermodynamic functions such as excess Gibbs energy, entropy, enthalpy, and volume. These quantities convey global or macroscopic infor mation on the system; global, in the sense that they do not reveal any molecular origin of these quantities. Recently, a complementary view based on the local properties of the same system was suggested. These properties are richer and more informative regarding the local properties such as local densities, com position, and the solvation effect. Here, two sets of quantities are calculated for two component mixtures in one dimension. The local properties were calcu lated using two different methods; one based on the Kirkwood-Buff theory, and the second is based on direct calculation of the pair correlation functions.