PPT Slide

13

• Solids generally have much lower vapor pressures than liquids.

Solid-Gas Equilibria

• Sublimation, a solid changing directly into a gas, usually requires  different conditions of pressure and temperature than vaporization.

• A few solids have high enough vapor pressures to sublime at normal conditions: dry ice (carbon dioxide), iodine, and moth repellent.

Phase Diagrams: Effect of Pressure and Temperature on Physical State

• Phase diagrams provides information about the physical state of a  substance over a wide range of pressures and temperatures

• 1. Regions of the diagram. Each area or region corresponds to one  of the substanceís phases. (s, l or g)

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