Guest Lecturer: Rob Lederer

The AP Chemistry exam and most US chemists still cling to the units torr and atm. The SI unit for pressure used by the rest of the world is the pascal. Rob Lederer is in Canada where the metric unit for pressure, kPa, is used.

Since the AP Chemistry exam uses atm and mm Hg, I have put the white-board notes in atm and mm Hg (torr).
Rob identifies the laws by their discoverer's names. There is no need to memorize the names as the names of the laws are not tested on the AP Chem exam.

• Gas Units  
• Pressure Volume  
• Temperature and Pressure and Volume  
• Ideal Gas Law - P V = n R T  

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• Gas Pressure and Molecular Collisions

• Gas Pressure and Molecular collisions is a classic video.
• Don't be distracted by its age. I have not seen a better video explaining gas pressure.
• James Arthur Campbell, the demonstrator for the video worked on the Manhattan Project and was one of my chemistry professors.
  The key developer of these the Chem Study films, Glenn Seaborg, was the only person to have had an element named after him while he was still alive. I have his autographed book on teaching chemistry.

Demonstrations

• 	Mercury barometers are no longer because of mercury fumes. However mm Hg is still used as the unit for pressure in the US. This is how a mercury barometer is made. Watching this will help you understand air pressure and mm Hg better. How to Make an Hg Barometer
  	The Cartesian Pressure Volume Diver
  	Gas Density and Flames This demonstration is from my favorite chemistry book, Fourteen Weeks in Chemistry by J. D. Steele, the first American homeschool chemistry teacher.
  	Hydrogen Oxygen Volume Stoichiometry