CH1012
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KINETIC MOLECULAR
THEORY OF GASES
THEORY OF GASES
Kinetic Molecular Model
of Gases
A
quantitative model used to
describe the macroscopic
properties of an ideal gas.
describe the macroscopic
properties of an ideal gas.
Based
on three postulates:
1) Molecules of mass m are in
ceaseless straight line motion.
1) Molecules of mass m are in
ceaseless straight line motion.
2) Size of
particles is negligible.
3) The
molecules do not interact
or they collide perfectly elastically.
or they collide perfectly elastically.
vThe pressure of
a gas results from the number of collisions per
unit time on the container walls.
vEach gas molecule has a
different kinetic energy as
it travels with a different translational (sliding) motion
ie. different velocity and direction (½mv2)
