Combined Gas Law
P1V1/T1 = P2V2/T2
T = Temperature
P = Pressure
V = Volume
A gas takes up 17 liters, has a pressure of 2.3 atm, and a temperature of 299 K. If I raise the temperature
to 350 K and lower the pressure to 1.5 atm, what is the new volume?
(12)(23) / 200 = (14)x / 300
276 / 200 = 14x / 300
82800 = 2800x
x = 29.57 L


Ideal Gas Law
PV = nRT
P = pressure
V = volume
n = number of moles
R = .0821
T = Temperature
How many moles of oxygen will occupy a volume of 2.5 liters at 1.2 atm and 25 degrees Celsius?
n = PV / RT
n = (1.2)(2.5) / (.0821)(298)
n = .122
