8. As a substance is subjected to pressure and/or temperature changes, it may undergo condensation, deposition, freezing, melting, sublimation, or vaporization. (a) Consider the phase diagram shown below and st ate the changes that take place upon going from points A to DoCto. (b) Is the transition from A to B exothermic or endothermic? A-B, B-CC-Da CHEM 1P92 Assignment 12B. Liquids, Solids, and Intermolecular Forces B Pressure D A Temperature