Introduction:
Molecules in the gas phase are in constant motion. Gas pressure is a measurement of the number
of collisions of molecules with the walls of the container. The velocity and the number of
collisions of these molecules changes when the temperature of the gas increases or decreases. In
this experiment, the relationship between the temperature of a gas sample and the pressure it
exerts will be investigated. And the number of moles of air will be determined.
Theory:
The Ideal Gas Law where p is pressure, v is volume, n number of moles, R constant and T the
temperature.
PV=nRT
Definition of a mole the number of moles
n
of gas is the ratio of the mass
m
and the molecular or atomic
mass
M
expressed in grams per mole:
Boyle's law if a gas is compressed while keeping the temperature constant, the pressure varies inversely
with the volume. Hence, Boyle's law can be stated thus: The product of the pressure
P
and its
corresponding volume
V i
s a constant. Mathematically,
PV
= constant.
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 Spring '09
 cortes
 2. 3. 4. 5. 6. 7. 8

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