CHEM 1040 Lecture Notes - Lecture 4: Triple Point, Phase Diagram
Document Summary
Definition: temperature at which the vapor pressure is equal to the atmospheric pressure. Normal boiling point: the boiling point a 1 atmosphere. Ex: the boiling point in the mountains is lower than the boiling point on plain fields because the atmospheric pressure decreases as altitude increases. Critical temperature: the temperature above which its gas cannot be liquefied. Critical pressure: the minimum pressure needed to liquefy a substance at its critical temperature. Phase diagram: (see text book for picture) Co2 cannot exist in the liquid phase below 5. 2 atmosphere. Triple point: combination of pressure and temperature where three phase of a substance exist in equilibrium.