CHM 111 Lecture Notes - Lecture 6: Pressure Measurement, Barometer, Torr

• School: University of Miami
• Department: Chemistry
• Course: CHM 111
• Professor: Lewis Nita

Document Summary

Ex: 2agno3 + cu cu(no3)2 + 2ag. For reactions like these, use the activity series to predict ability to displace one element by. Part of the sample is oxidized and part is reduced. In sipping your favorite beverage, your mouth creates a partial vacuum in a straw. The result is a pressure difference between the area inside and the outside of it. Pressure is the force exerted per unit area by gas molecules as they strike the surfaces around them. Just as a ball exerts a force when it bounces against a wall, so a molecule exerts a force when it collides with a surface. The sum of all these molecular collisions is pressure, a constant force on the surfaces exposed to any gas. The total pressure exerted by a gas depends on several factors, including the concentration of gas molecules in the sample.