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DIFFUSION OF  GASES BY:rahul jain CLASS:12
What is diffusion? ,[object Object],Diffusion  is the  movement of particles that allows them to spread out and mix with other particles.   For example, the smell of aftershave or perfume diffuses and is detected by people on the other side of the room. Use the particle model to explain these facts about diffusion: ,[object Object],[object Object]
How do smells spread out? Where is the smell coming from and how does it spread out?
Diffusion animation 1
Diffusion animation 2
[object Object],Diffusion experiment cotton wool soaked in  ammonia solution cotton wool soaked in  concentrated hydrochloric acid Which gas particles diffuse faster, ammonia or acid, and why? By the time the gases meet, the ammonia particles have travelled further down the tube so they must have diffused at a faster speed. In this experiment, two gases diffuse towards each other in a sealed glass tube. gases meet here
The distribution of speeds for nitrogen gas molecules at three different temperatures 5.7 Velocity of a Gas The distribution of speeds of three different gases at the same temperature u rms  =  3 RT M 
Gas diffusion  is the gradual mixing of molecules of one gas with molecules of another by virtue of their kinetic properties. 5.7 NH 3 17 g/mol HCl 36 g/mol NH 4 Cl
Gas Diffusion relation of mass to rate of diffusion ,[object Object],[object Object],[object Object],[object Object]
GAS DIFFUSION AND EFFUSION ,[object Object],[object Object]
Graham’s Law: Diffusion and Effusion of Gases ,[object Object],[object Object],[object Object],[object Object],[object Object]
GAS DIFFUSION AND EFFUSION ,[object Object],Thomas Graham, 1805-1869. Professor in Glasgow and London. Rate of effusion is inversely proportional to its molar mass.
GAS DIFFUSION AND EFFUSION ,[object Object],[object Object],[object Object],[object Object],He
THE END

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Diffusion of gases

  • 1. DIFFUSION OF GASES BY:rahul jain CLASS:12
  • 2.
  • 3. How do smells spread out? Where is the smell coming from and how does it spread out?
  • 6.
  • 7. The distribution of speeds for nitrogen gas molecules at three different temperatures 5.7 Velocity of a Gas The distribution of speeds of three different gases at the same temperature u rms = 3 RT M 
  • 8. Gas diffusion is the gradual mixing of molecules of one gas with molecules of another by virtue of their kinetic properties. 5.7 NH 3 17 g/mol HCl 36 g/mol NH 4 Cl
  • 9.
  • 10.
  • 11.
  • 12.
  • 13.