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Chapter 11

Chapter 11. Be able to solve using the Ideal gas Law. Ideal Gas Law. The Idea gas law is a the mathematical relationship of pressure, volume, temperature, and the number of moles of a gas. Ideal gas law considers Avogadro’s law that volume is proportional to the number of moles.

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Chapter 11

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  1. Chapter 11 Be able to solve using the Ideal gas Law.

  2. Ideal Gas Law • The Idea gas law is a the mathematical relationship of pressure, volume, temperature, and the number of moles of a gas. • Ideal gas law considers Avogadro’s law that volume is proportional to the number of moles.

  3. Ideal Gas Law • PV = nRT • P = pressure • V = Volume • n = moles • R = constant • T = Temperature

  4. PV = nRT • The equation states that the volume of a gas varies directly with the number of moles (or molecules) of a gas. • Volume varies inversely with pressure • R = 0.0821 L atm/(mol K) • R value will change with pressure

  5. Numerical Values of the Gas Constant, R • 62.4 L mmHg/(mol K) • 0.0821 L atm/(mol k) • 8.314 J/(mol k) • 8.314 L kpa/ (mol k)

  6. Practice • What is the pressure in atmospheres exerted by a 0.500 mol sample of nitrogen gas in a 10L Container at 298K?

  7. More Practice • What is the volume, in liters, of 0.250 mol of oxygen gas at 20C and 0.974 atm pressure?

  8. More Practice • What mass of chlorine gas, Cl2 in grams, is contained in a 10.0 L tank at 27C and 3.50 atm of pressure?

  9. PM=DRT • P = pressure • M = molar mass (g/mol) • D = density g/L • R = .0821 atmxL/molxK • T = temperature in K

  10. Practice • At 28C and .0974 atm, 1L of gas has a mass of 5.16g, what is the molar mass of this gas?

  11. Practice • What is the density of a sample of ammonia gas, NH3, if the pressure is .928 atm and the temperature is 63C?

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