Not
long
ago, in a chemistry
Mayso
the
FORCE/area
be with you
lab far far away…
1. Describe Boyle’s Law with a formula.
2. Use Boyle’s Law to determine either a
pressure or volume
3. Describe Charles’ Law with a formula.
4. Use Charles’ Law to determine either a
temperature or volume
P α 1/V
This means Pressure and
Volume are INVERSELY
PROPORTIONAL if
moles and
temperature are
constant (do not
change). For example,
P goes up as V goes
down.
PV

PV
1 1
2 2
Robert Boyle
(1627-1691).
Son of Earl of
Cork, Ireland.
Boyle’s Law Summary
Pressure is inversely proportional to volume
when temperature is held constant.
PV

PV
1 1
2 2
A bicycle pump is a
good example of
Boyle’s law.
As the volume of the
air trapped in the
pump is reduced, its
pressure goes up,
and air is forced into
the tire.
P1
V1
(0.947 atm) (0.15 L)
P2
V2
(0.987 atm) V2
0.14 L
or 140 mL
P1
V1
(1 atm) (0.5 L)
P2
V2
(0.5 atm)
1L
V2
If n and P are constant,
then V α T
V and T are directly
proportional.
V1 V2

T1 T2

If one temperature
goes up, the volume
goes up!
Jacques Charles
(1746-1823). Isolated
boron and studied
gases. Balloonist.
Charles’s Original Balloon
Modern LongDistance Balloon
Charles’ Law Summary
The volume of a gas is directly
proportional to temperature, and
extrapolates to zero at zero Kelvin.
(P = constant)
V1 V2

T1 T2
V1
V2
T1
T2
0.075 L
V2
298 K
323 K
0.081 L
V1
V2
T1
T2
2.75 L
2.46 L
293.0 K
T2
262 K or
-10.9 oC
1. Describe Boyle’s Law with a formula.
2. Use Boyle’s Law to determine either a
pressure or volume
3. Describe Charles’ Law with a formula.
4. Use Charles’ Law to determine either a
temperature or volume
Pass the
Clicker!!!
1.
2.
3.
4.
5.
150. atm
.0200 atm
50.0 atm
.0500 atm
Not listed
1.
2.
3.
4.
5.
-124oC
149oC
325oC
12.8oC
Not listed
1.
2.
3.
4.
5.
1140 L
6.00 L
1.50 L
.00197 L
.167 L