1: KINETIC MOLECULAR THEORY OF GASES

• Gases


  The moving particles with unit conversion
• States of matter

  • Solid
  • Liquid
  • Gas
• Kinetic Molecular Theory


  Shows a model of moving particles to clarify properties of matter
• Cohesion


  An attractive force that holds particles together
• Basic Assumption of the Kinetic Molecular Theory of Gases

  • Particle Volume
  • Particle Motion
  • Particle Collisions
• Physical Quantities by which gas molecules are characterized

  • Volume
  • Temperature
  • Amount of Substance
  • Pressure
• Volume


  The space occupied by a sample of matter
• Temperature


  A physical quantity that affects the behavior of gas particles or molecules
• Pressure


  The force exerted per unit area
• Temperature


  A measure of how hot or cold something is, specifically a measure of the average kinetic energy of the particles in an object
• Units of measure for Temperature

  • Celsius (°C)
  • Fahrenheit (°F)
  • Kelvin (K)
• Celsius to Kelvin


  K = oC + 273.15
• Kelvin to Celsius


  oC = K − 273.15
• Pressure


  A force exerted by the substance per unit area on another substance
• Gas pressure


  The force that the gas exerts on the walls of its container
• Gas pressure is increased when

  The temperature increases or the volume of the container decreases
• Pascals (Pa)


  The standard SI unit of pressure, named after scientist Blaise Pascal
• Standard Atmospheres (atm)


  The unit atmosphere (atm) is convenient because it is about equal to the atmospheric pressure
• torr (Torr)

  The unit torr is almost equal to 1 mm of Hg