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Launc
Jens Martensson
BOYLE’S LAW
Also known as Mariotte’s Law
• formulated by Robert Boyle
in 1662
• was also discovered by the
French physicist Edme
Mariotte in 1676.
Jens Martensson
BOYLE’S LAW
• This law states that the pressure
and volume of a gas is inversely
proportional. Temperature and
amount of gas are constant.
Pressure – defined to be the
amount of force.
Volume – is the quantity of space
occupied by matter.
Jens Martensson
BOYLE’S LAW
• The pressure and volume of a
gas is equal to a constant value.
When the value of the pressure
increases, the value of the
volume decreases (vice versa).
Jens Martensson
FORMULA:
Since volume and pressure is inversely proportional, therefore;
P is proportional to 1/V
P= k/V
PV = k — the product of pressure and volume is a constant.
P= pressure
V= volume
k= proportionality constant
Jens Martensson
• Boyle’s law is used to compare the initial and final/ new set of
different conditions.
P1V1 (initial condition) P2V2 (new condition)
P1 V1 = P2 V2
Jens Martensson
HOW TO USE BOYLE’S LAW TO CALCULATE NEW GAS
VOLUME OR PRESSURE:
Example:
A tire with a volume of 15.30 L reads 53 psi on
the tire gauge. What is the new tire pressure if you
compress the tire and its volume is 12.6 L?
Jens Martensson
STEP 1: IDENTIFY THE
KNOWN QUANTITIES
AND THE DESIRED
QUANTITY.
P1 = 53 psi
V1 = 15.30 L
Step 2: Substitute the value.
(53 psi) (15.30 L) = (P2)(12.6 L)
Step 3: Solve the problem.
!" #$% ('!.") *)
',.- *
=
(P2)(12.6 L)
',.- *
Basically, there
are 2 sig. figures
in the
measurement 53
psi. Therefore,
the answer must
be in 2 sig. figures
P2 = ?
V2 = 12.6
P2 = 64.3571429 psi
Final Answer: P2 = 64 psi
Jens Martensson
Step 2: Substitute the value.
(53 psi) (15.30 L) = (P2)(12.6 L)
Step 3: Solve the problem.
!" #$% ('!.") *)
',.- *
=
(P2)(12.6 L)
',.- *
P2 = 64.3571429 psi
Jens Martensson