Draw phase diagrams for the following types of systems. Label the regions and intersections of the diagrams, stating what materials (possibly compounds or azeotropes) are present and whether they are solid liquid or gas.
(a) One component, pressure-temperature diagram, liquid density greater than that of solid.
(b) Two-component, temperature-composition, solid-liquid diagram, one compound AB formed that melts congruently, negligible solid-solid solubility.