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Boyle’s Law
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Boyles Law
Shows the mathematical relationship between pressure and
volume if all other variables are constant
Inversely related
P1V1 = P2V2
STP – abbreviation of standard temp and pressure
( 0oC and 1 atm)
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Examples
A sample of gas occupies 125ml at standard pressure. What is its
pressure when its volume is compressed to 75.0 ml?
A cylinder fitted wit a piston contains 14.0L at a pressure of 7.50
atms. The entire contents of the cylinder are forced into a tightly
folded plastic bag at 1.00atm. What will the volume of the bag
be?
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Practice
The pressure of 625ml sample of gas is changed from
0.925atm to 1.45atm. What is the new volume of the gas?
In the compression stroke of an engine, the volume of the
cylinder changes from 900ml at 1.00atm to 125ml. What is
the final pressure in the cylinder?
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Practice
The cylinder of a typical pump has a volume of 1.25L at
standard pressure. A bicycle tire is intended to be inflated to
a total pressure of 4.75atm. To reach this pressure, the
confined gas in the pump is compressed to a smaller volume.
At what volume does the confined gas exert a pressure of
4.75atm?
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