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The Ideal Gas Law

The Ideal Gas Law. PV = nRT. 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. Ideal Gas Law. R values If pressure is in atm, R = .0821 L atm/K mol

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The Ideal Gas Law

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  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 = 8.314 x 103 L Pa/K mol • If pressure is in torr (mm of Hg), R = 62.36 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 = T =

  6. Ideal Gas Law • 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: 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 = .0821 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 = .0821 L atm/K mol T = x

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

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