1. The Ideal Gas Law
PV = nRT

2. Ideal Gas Law P = pressure – in atm, Pa, or torr
V = volume – we will always use liters
N = number of moles
R = ideal gas constant
T = temperature – always in Kelvin

3. Ideal Gas Law R values If pressure is in atm, R = .0821 L atm/K mol
If pressure is in Pa,
R = x 103 L Pa/K mol
If pressure is in torr (mm of Hg),
R = L Torr/K mol

4. Ideal Gas Law
If I have 4 moles of a gas at a pressure of 5.6 atm and a volume of 12 liters, what is the temperature?

5. Ideal Gas Law Begin by listing what you know and want: P = V = n = R =

6. Ideal Gas Law Begin by listing what you know and want: P = 5.6 atm V =
R =
T =

7. Ideal Gas Law Begin by listing what you know and want: P = 5.6 atm
V = 12 liters
n =
R =
T =

8. Ideal Gas Law Begin by listing what you know and want: P = 5.6 atm
V = 12 liters
n = 4 moles
R =
T =

9. Ideal Gas Law Begin by listing what you know and want: P = 5.6 atm
V = 12 liters
n = 4 moles
R = L atm/K mol
T =

10. Ideal Gas Law Begin by listing what you know and want: P = 5.6 atm
V = 12 liters
n = 4 moles
R = L atm/K mol
T = x

11. Ideal Gas Law 5.6(12) = 4(.0821)x 67.2 = .3284x X = 204 K
Substitute in information and solve for x
5.6(12) = 4(.0821)x
67.2 = .3284x
X = 204 K