Chemistry Unit 7

• Effusion-Movement of a gas molecule to one container to another through a tiny hole.
• A balloon loosing gas in an example of?

  Effusion
• Diffusion- movement of particles from high concentration to areas of low concentration
• The difference between effusion and diffusion is the gas molecules disperse to a general spread meanwhile, in effusion the gas passes through a small hole.
• Charles Law- Volume of a gas increases as the temperature of the gas increases, and the volume of the gas decreased as the temperature of the gas decreased (V up, T up)
• Boyle's Law- As pressure of gas increases, volume decreases because gas particles are forced closer together, (inversely related if one goes up the other goes down P up, V, down)
• Gay-Lussac's Law: Pressure of a given amount of gas held at constant volume is directly proportional to kelvin temp. (P up T up)
• P1V1=P2V2


  Boyle's law
• V1/T1=V2/T2


  Charles Law
• Pressure =


  Force/Area (F/A)
• Force/Area (F/A)=


  Collisions
• P1/T1=P2/T2


  Gay-Lussac
• Convert C --> K

  +273
• Combined Gas law formula

  P1V1/T1=P2V2/T2
• Combined Gas Law- relationship between pressure, volume, and temperature of a fixed amount of gas (all three glasses squished together).
• n=


  mole
• R=


  0.0821 L ATM/mol K
• Ideal Gas Law Formula

  PV=nRT
• STP


  standard temperature and pressure
• What is STP normally?

  273K, 1 atm
• Partial Pressure


  contribution each gas in a mixture of gases makes to the total pressure (add everything to find) (proportional to its mole fraction)
• KMT (kinetic Molecular Theory)

  1. all matter is made of particles
  2. Particles are in constant motion
  3. as energy is added, particles speed up
  4. As particles speed up, they spread apart
  5. different particles have different amounts of inter molecular force
• What theory explains ideal gasses?

  KMT
• Gasses can only be directly compared?

  STP
• Water Displacement 


  bottle w water is flipped upside down in pan of water and gas produced in the reaction, displaces water in the bottle