What is an example of a gas pressure practice problem?

1 Answer
May 24, 2014

There are many laws that deal with gas pressure.
Boyle's Law P1V1=P2V2, Charles' Law V1T1=V2T2, Ideal Gas Law PV=nRT, Dalton's Law P1+P2+P3=PTotal

Here is an example using the Combined Gas Law.

A certain sample of gas has a volume of 0.452 L measured at 87°C and 0.620 atm. What is its volume at 1 atm and 0°C?

The formula for the combined gas law is
(Pi)(Vi)Ti=(Pf)(Vf)Tf

We begin by identifying the values for each of the variables and identifying the missing value.

Pi = 0.620 atm
Vi = 0.452 L
Ti = 87 C + 273 = 360 K

Pf = 1 atm
Vf = ???
Tf = 0 C + 273 = 273 K

(0.620atm)(0.452L)360K=(1atm)(x)273K

(273K)(0.620atm)(0.452L)(360K)(1atm)=(xL)

xL=0.212L

I hope this was helpful.
SMARTERTEACHER