Vapor Pressure

For notes today we discussed vapor pressure and boiling point. The boiling point of a liquid is when the vapor pressure equals the external pressure. When the pressures are equal it is easier for liquids to boil and vaporize into gases and steam away. We discussed definitions and answered questions about vapor pressure graphs. STP is 101.3kpa, 1 atm, or 760 torr.

Vapor pressure is measured with a manometer. A "normal" manometer is when the levels in the U are even. A "HOT" manometer has increased vaporization and increased particle movement so the liquid levels in the U are pushed away.