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The Ideal Gas Law PV = nRT. Ideal Gas Law P = pressure – in atm, Pa, or torr P = pressure – in atm, Pa, or torr V = volume – we will always use liters.

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Presentation on theme: "The Ideal Gas Law PV = nRT. Ideal Gas Law P = pressure – in atm, Pa, or torr P = pressure – in atm, Pa, or torr V = volume – we will always use liters."— Presentation transcript:

1 The Ideal Gas Law PV = nRT

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

3 Ideal Gas Law R values R values If pressure is in atm, If pressure is in atm, R =.0821 L atm/K mol R =.0821 L atm/K mol If pressure is in Pa, If pressure is in Pa, R = x 10 3 L Pa/K mol If pressure is in torr (mm of Hg), If pressure is in torr (mm of Hg), R = L Torr/K mol 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? 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: Begin by listing what you know and want: P = V = n = R = T =

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

7 Ideal Gas Law Begin by listing what you know and want: 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: 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: Begin by listing what you know and want: P = 5.6 atm V = 12 liters n = 4 moles R =.0821 L atm/K mol T =

10 Ideal Gas Law Begin by listing what you know and want: Begin by listing what you know and want: P = 5.6 atm V = 12 liters n = 4 moles R =.0821 L atm/K mol T = x

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


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