Chapter 4 Properties of gases

The Nature of Gases       

Observing Gases Pressure  


Gas pressure is the name given to the force exerted by gas particles colliding with the wall of their container.

Alternative Unit of Pressure  

approximately:
1 atm = bar1
atm = 760 torr 1
torr = 1 mm Hg
1 atm = 101324.99766353 pa

The Ideal Gas Laws  

The Experimental Observations   Applications of the Ideal Gas Law

Molar Volume and Gas Density

Density of a gas at STP. The formula D= M/V is used at STP with M being equal to the molar mass and V being molar volume of a gas

Gase; in Mixtures and Reaction 

Mixtures of Gases  

The Stoichiometry of Reacting Gases

 

Molocular Motion            

Diffusion and Effusion 

  • diffusion and effusion of gases Diffusion occurs when gas molecules disperse throughout a container.
  • Effusion occurs when a gas passes through an opening that is smaller than the mean free path of the particles, that is, the average distance traveled between collisions. Effectively, this means that only one particle passes through at a time.

The Kinetic Model of Gases 

 The kinetic theory of gases is a scientific theory that explains the microscopic properties of gases, for example, temperature and volume, taking into account the molecular structure and microscopic compositions of gases. The theory states that the pressure of gases does not result from static repulsion between the molecules, but from dynamic collisions between the molecules, which have speed and momentum.

The Maxwell Distribution of Speeds  

The Distribution of Molecular Speeds? 

Real Gases  

Deviations from Ideality   Equations of State of Real Gases   C E, The Liquefaction of Gases 

Intermolecular Forces   

The Origin of Interm olecular Forces

  •  Ion-Dipole Forces
  •  Dipole-Dipole Forces  
  •  London Forces  
  •  Hydrogen Bonding  
  •  Repulsions