Sophia Learning
Sophia: Bill Nye Demonstration: Crushing a Can With Air
Discover the effects of water vapor, the form water takes on as a gas, when it undergoes changes in atmospheric pressure as Bill Nye the Science Guy provides a demonstration of the compound water.
Other
Chemical Reax/exothermic Reactions
A wonderfully complete primer on exothermic reactions in the context of chemical spills. Covers Reactions with Air or Water, Combustible Organics, Polymerization Reax, Decomposition, Corrosion, and much much more.
University of Illinois
University of Illinois Urbana Champaign: Observed Dew Point Temperature
Describes what dew point is and how it relates to moisture content of the air. Also explains condensation and relative humidity.