Gases are the state of matter with the greatest amount of
energy. Pressure is created by gas particles running into the
wall of the container. Pressure is measured in many units: 1 atm
= 101300 Pa = 101.3 kPa = 760 mm Hg = 14.7 psi. Atmospheric
pressure is the pressure due to the layers of atmosphere above
us. Kinetic Molecular Theory The Kinetic Molecular Theory has
several assumptions for ideal gases. - Gases are made of atoms
or molecules - Gas particles are in rapid, random, constant
motion - The temperature is proportional to the average kinetic
energy - Gas particles are not attracted nor repelled from each
other - All gas particle collisions are perfectly elastic (they
leave with the same energy they collided with) - The volume of
gas particles is so small compared to the space between them
that the volume of the particle is insignificant Real gases do
have a volume (that takes up space which other particles cannot
occupy) and they do have attractions/repulsions from one another
as well as in-elastic c