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Find initial pressure of helium gas - Boyles Law - Chemistry problem solver

In the laboratory, a sample amount 200 cu.cm (initial volume) of helium gas is taken. It's volume is compressed into 0.240 cu.cm (final volume). Its pressure (final pressure) is read as 3.00 cm Hg. What was the original pressure (initial pressure) of the helium gas ?


initial volume = 200
final volume = 0.24
final pressure = 3
P1 =  ( P2 * V2 ) / V1
initial pressure = ( 3 * 0.24 ) / 200
initial pressure = 0.0036
So the initial pressure is 0.0036

Boyles Law :

When the pressure of the gas increases the volume of the gas decreases at constant pressure.

Boyles law Formulas :

P1 =  ( P2 * V2 ) / V1

V1 =  ( P2 * V2 ) / P1

P2 =  ( P1 * V1 ) / V2

V2 =  ( P1 * V1 ) / P2


where,

P1 = initial pressure
P2 = final pressure
V1 = initial volume
V2 = final volume

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