Schematic Phase Diagrams

A schematic phase diagram is a visual tool that shows how a substance changes between different states—such as solid, liquid, and gas—depending on temperature and pressure. It features lines called boundaries, which indicate the conditions where two phases coexist in equilibrium. These diagrams help us understand when a material will melt, boil, or solidify by illustrating the relationships between variables. They are simplified representations that highlight key features like critical points and phase transitions, making it easier to predict how substances behave under various conditions.