Download Kinetic Molecular Theory KMT

Kinetic Molecular Theory
Gases
Gas, liquid and solid
KMT of gases
• Gas particles are so small
their size is insignificant.
• There are no attractive
nor repulsive forces
between gas particles.
• The particles are in
constant random motion.
• All collisions are
completely elastic.
Translational
motion
Gas Pressure
• Gas pressure is
defined as the force
exerted by the gas
particles on the walls
of its container.
• Pressure =
• Force/ Area
Atmospheric Pressure
Air pressure and Air density
The 777 wing uses the most
aerodynamically efficient airfoil ever
developed for subsonic commercial
aviation. This advanced wing enhances
the airplane's ability to climb quickly and
cruise at higher altitudes than
competing airplanes while achieving
higher cruise speeds. It also allows the
airplane to carry full passenger
payloads out of many high-elevation,
high-temperature airfields.
Why is the design of the wing so
important?
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•
•
•
What occurs as the plane ascends?
The air gets colder.
The air gets thinner.
There are fewer air particles for the
airplane wing to use for lift.
Vacuum
• Empty Space with
no gas particles.
• Not this vacuum
• This kind
One Standard Atmosphere
• To measure Atmospheric Pressure we
have several devices.
Mercury Barometer
Barometers
Gas molecules at different
temperatures