Gas Laws and Liquid Oxygen

Avogadro’s Law

• As the number of gas molecules increases, the frequency of collisions also increases.
• The increased collision frequency leads to an increase in the pressure of the gas.
• Flexible containers, such as balloons, expand until the internal gas pressure balances the external pressure.

Combined Gas Law

• Combines the relationships between pressure, volume, and temperature of a gas.
• Examples of gas mixtures include Heliox.

Ideal Gas Law

• For a gas law to be considered ideal, it must account for the following properties:
  • Pressure
  • Volume
  • Temperature
  • Density

Liquid Oxygen

• Liquid oxygen is produced by:
  • Compressing air.
  • Cooling the compressed air to below its boiling point ($-183$ °C or $-297$ °F).
  • Separating oxygen from the liquefied air mixture.
• After separation, the oxygen is stored in insulated containers below its boiling point.
• Oxygen remains liquid at atmospheric pressure as long as the temperature stays below $-183$ °C.
• If the temperature of the liquid oxygen exceeds its critical temperature of $-118.8$ °C, it immediately converts into a gas.