Transcript No Slide Title

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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