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Transcription
July 12
Boyle's Law: P1V1 = P2V2
P1 = pressure of the gas at volume V1
P2 = pressure of the gas at volume V2
If temperature and number of moles are constant:
P1V1 = P2V2
Example:
A sample of gas occupies 500 mL at a pressure of 760 mm Hg. What will be the pressure if the volume is changed to 250 mL?
Solution:
P1 = 760 mm Hg
V1 = 500 mL
P2 = ?
V2 = 250 mL
P1V1 = P2V2
(760)(500) = P2(250)
380,000 = 250P2
P2 = 380,000 / 250
P2 = 1520 mm Hg
Answer: The new pressure is 1520 mm Hg.
Note:
This law applies only when temperature and amount of gas remain constant.