Kinetic Molecular Theory Gases

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Kinetic Molecular TheoryGases

• Gas, liquid and solid

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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.

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Translational motion
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Gas Pressure

• Gas pressure is defined as the force exerted by
  the gas particles on the walls of its container.
• Pressure
• Force/ Area

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Atmospheric Pressure
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Air pressure and Air density
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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.
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Why is the design of the wing so important?

• 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.

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Vacuum

• Empty Space with no gas particles.
• Not this vacuum?
• This kind?

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One Standard Atmosphere

• To measure Atmospheric Pressure we have several
  devices.

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Mercury Barometer
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Barometers
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Gas molecules at different temperatures