Question

A sample of carbon dioxide occupies a volume of 3.50 liters at pressure 125 kPa. What pressure would the gas exert if its volume was decreased to 1.75 liters?

Answer 1

 Boyle's Law can be expressed as 

 P1V1 = P2V2

initial pressure P1 = 125 Kpa

initial volume V1 = 3.50 L

final pressure P2= ??

final volume V2 = 1.75 L

Hence 

P2 = P1V1/V2

P2 = 125 KPa * 3.50 L/1.75 L =250 KPa

answer

final pressure = 250 KPa

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