Name
Equation
Definition
Force
Mass x gravity
(kg.m/s
2
)
Force produced by an object is due to
mass and gravity.
On earth gravity = 9.81m/s
2
Pressure
P = force/area
(kg/m.s
2
)
Force applied to unit of area.
Boyles Law
P
1
V
1
=P
2
V
2
Since pressure is inversely related to
volume, the product of P and V will
always be a constant when temp. is
constant.
Charles Law
V
1
/T
1
= V
2
/T
2
Since volume and Kelvin temperature of
a gas are directly proportional, the
quotient of V/T is always a constant
when pressure is constant.
Gay
Lussac’s Law
P
1
/T
1
= P
2
/T
2
Pressure is directly proportional to
Kelvin temperature
, the quotient of P/T
is constant when volume is constant.
Combined Gas Law
P
1
V
1
/ T
1
=P
2
V
2
/
T
2
Using the three equations above, we
can express these ideas together in the
combined gas law. A very useful law in
the lab since we are rarely at STP!!
Avo
gadro’s Law
V
1
/N
1
= V
2
/N
2
Volume of a gas is directly proportional
to number of moles, this holds true for
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 Spring '11
 AprilAdrian

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