gas laws

• what is pressure 


  the concentration of a force of the force per unit area
• what happens to the pressure of an object when immersed in a liquid

  forces are created against the surfaces at 90 degrees to the surface
• if a force is spread over a large area....

  a small pressure is created
• if a force is spread over a small area....

  a large pressure is created
• what is a mole

  the amount of a substance
• how many atoms are there in one mole of gas

  6.02 x10^23
• what is the molar mass

  the mass of the substance divided by the amount of that substance
• what is boyle's law

  if the temp is constant, pressure is conversely proportional to the volume
• what is charles's law

  if the pressure is constant, then volume is proportional to the temperature
• whay is Gay-Lussac's law

  if the volume is constant, then pressure is proportional to the temperature
• what must you do before using any gas law

  convert to kelvin
• what is an ideal gas

  a gas which obeys the ideal gas equation at all pressures, volumes and temperatures
• what must you do before using ideal gas equations

  convert to kelvin
• what are the assumptions of ideal gases described through the kinetic theory

  gas molecules move randomly and at high speeds

  the molecules obey newton's laws of motion

  there are no intermolecular forces between molecules except during collisions
• what do real gases not always obey

  ideal gas equation
• what is the equation for the initial momentum of a gas particle when it hits a wall 


  mv
• what is the equation for the final momentum of a gas particle when it hits a wall 


  -mv
• what is the equation for the force exerted by the wall on a gas molecule 


  F = - (2mv) / change in t
• how do you deduce the total pressure produced by all the gas molecules in a box 


  find the change in momentum as a single molecule hits a wall perpendicularly

  
  

  calculate the number of collisions per second by the molecule on a wall

  
  

  find the change in momentum per second

  
  

  calculate the total pressure from N molecules

  
  

  consider the effect of the molecule moving in 3D space

  
  

  re-write the pressure equation
• what does mean square speed mean with gas molecules in a container

  average speed
• what does the internal energy of an ideal gas equal to

  its average kinetic energy if the molecules are far enough apart