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7: Gases

  • Page ID
    393898
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    • 7.1: Kinetic Molecular Theory- A Model for Gases
      The physical behavior of gases is explained by the kinetic theory of gases. An ideal gas adheres exactly to the kinetic theory of gases.
    • 7.2: Pressure - The Result of Constant Molecular Collisions
      Pressure is a force exerted over an area. Pressure has several common units that can be converted.
    • 7.3: Boyle’s Law - Pressure and Volume
      Boyle’s Law relates the pressure and volume of a gas at constant temperature and amount.
    • 7.4: Charles’s Law- Volume and Temperature
      Charles’s Law relates the volume and temperature of a gas at constant pressure and amount. In gas laws, temperatures must always be expressed in kelvins.
    • 7.5: Gay-Lussac's Law- Temperature and Pressure
      Gay-Lussac's Law states that the pressure of a given mass of gas varies directly with the absolute temperature of the gas, when the volume is kept constant. Gay-Lussac's Law is very similar to Charles's Law, with the only difference being the type of container. Whereas the container in a Charles's Law experiment is flexible, it is rigid in a Gay-Lussac's Law experiment.
    • 7.6: Avogadro’s Law- Volume and Moles
      The original statement of Avogadro’s law states that equal volumes of different gases at the same temperature and pressure contain the same number of particles of gas. Because the number of particles is related to the number of moles, Avogadro’s law essentially states that equal volumes of different gases at the same temperature and pressure contain the same amount (moles, particles) of gas.
    • 7.7: The Ideal Gas Law- Pressure, Volume, Temperature, and Moles
      The Ideal Gas Law relates the four independent physical properties of a gas at any time. The Ideal Gas Law can be used in stoichiometry problems with chemical reactions involving gases. Standard temperature and pressure (STP) are a useful set of benchmark conditions to compare other properties of gases. At STP, gases have a volume of 22.4 L per mole. The Ideal Gas Law can be used to determine densities of gases.
    • 7.8: Mixtures of Gases - Why Deep-Sea Divers Breathe a Mixture of Helium and Oxygen
      The pressure of a gas in a gas mixture is termed the partial pressure. Dalton’s Law of Partial Pressures states that the total pressure in a gas mixture is the sum of the individual partial pressures. Collecting gases over water requires that we take the vapor pressure of water into account. Mole fraction is another way to express the amounts of components in a mixture.


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