2. An enclosed gas at a constant temperature, occupies 75 liters, at a pressure of 700mm of Hg. Find the pressure of gas,if its volume increases to 100litres at the same temperature. [525 mmof Hg]
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Initial volume of gas=(V1) =75 litre
Initial pressure of gas(p1) =700 mm
final volume of gas(V2) =100 litre
final pressure of gas(P2) =?
by Boyle's law: P1 V1=P2 V2
P2=P1V1/V2
=700×75/100
=525 mm of Hg
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