What are the three differences between diffusion and effusion?
1 Answer
SPACE OF MIXING (A and B gases)
Diffusion is when gas A spreads throughout a volume of gas B,
Effusion is when gas A moves from its chamber through a "tiny hole" into an open chamber containing gas B
FORCE OF MIXING
Diffusion of gas A into gas B is exerted by a difference of A-concentrations.
Effusion of gas A into gas B is exerted by a difference of A-pressures
RATE OF MIXING
Effusion transports particles faster (than diffusion) because effusing particles don't have to move around other particles to get to their destination; created negative pressure causes quick movement.
Diffusion rate is limited by the size and kinetic energy of the other particles in the solution, in addition to the concentration gradient.
Finally,
Graham's law expresses the relationship between the rate of effusion or diffusion and the molar mass of the gases.
