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Compare Interstitial and Vacancy Atomic mechanism for Diffusion?
(a) Compare interstitial and vacancy atomic mechanisms for diffusion. (b) Cite two reasons why interstitial diffusion is normally more rapid than vacancy diffusion. Solution (a) With vacancy diffusion, atomic motion is from one lattice site to an adjacent vacancy. Self-diffusion and the diffusion of substitutional impurities proceed via this mechanism. On the other hand, atomic motion is from interstitial site to adjacent interstitial site for the interstitial diffusion mechanism. (b) Interstitial diffusion is normally more rapid than vacancy diffusion because: (1) interstitial atoms, being smaller, are more mobile; and (2) the probability of an empty adjacent interstitial site is greater than for a vacancy adjacent to a host (or substitutional impurity) atom.
Why does diffusion happen when gases are mixed?
Diffusion occurs when gases are mixed because the gas molecules are in constant random motion. As they move, they collide with each other, transferring energy and causing the molecules to spread out. This results in the gradual mixing of the gases until they are evenly distributed in the container.
How do you calculate diffusion in a given system?
Diffusion in a system can be calculated using Fick's law of diffusion, which states that the rate of diffusion is proportional to the concentration gradient. The formula for calculating diffusion is D (C2 - C1) / (X2 - X1), where D is the diffusion coefficient, C is the concentration, and X is the distance.
What is a catchy title for osmosis and diffusion?
"Flowing Through Membranes: Osmosis and Diffusion Explained"
What is the movement of particles from a highly concentrated area to a less concentrated area called?
Actıve absorbtıon
Compare Interstitial and Vacancy Atomic mechanism for Diffusion?
(a) Compare interstitial and vacancy atomic mechanisms for diffusion. (b) Cite two reasons why interstitial diffusion is normally more rapid than vacancy diffusion. Solution (a) With vacancy diffusion, atomic motion is from one lattice site to an adjacent vacancy. Self-diffusion and the diffusion of substitutional impurities proceed via this mechanism. On the other hand, atomic motion is from interstitial site to adjacent interstitial site for the interstitial diffusion mechanism. (b) Interstitial diffusion is normally more rapid than vacancy diffusion because: (1) interstitial atoms, being smaller, are more mobile; and (2) the probability of an empty adjacent interstitial site is greater than for a vacancy adjacent to a host (or substitutional impurity) atom.
What has the author Qiongshan Zhang written?
Qiongshan Zhang has written: 'Fundamental studies of atomic diffusion by computer simulation of atomic processes on the giga event scale and multiple PC's in parallel' -- subject(s): Diffusion, Computer simulation
What has the author Brian Tuck written?
Brian Tuck has written: 'Physical electronics' -- subject(s): Electronics 'Atomic diffusion in III-V semiconductors' -- subject(s): Diffusion, Semiconductors
Three types of passive transport?
Simple diffusion: Small, non-polar molecules move across the cell membrane without the need for energy. Facilitated diffusion: Larger or polar molecules use carrier proteins to move across the cell membrane without energy expenditure. Osmosis: The movement of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.
What do you call the movement of molecules or atoms from a region of higher concentration to a region of lower concentration?
The Atomic or Molecular movements generally known as Osmotic diffusion.
What are the types of cultural diffusion?
contagious diffusion, relocation diffusion, expansion diffusion, stimulus diffusion, hierarchical diffusion.
The spreading out of a substance from an area of high concentration to an area of low concentration is called .?
diffusion
What atomic lattice defect aids diffusion?
I think it would be a point defect because a vacancy in the lattice structure would allow another atom to take the place of the vacancy.
What is the method sintering used for?
Sintering is a method for creating objects from powders. It is based on atomic diffusion. Powder is heated to near it's melting point in a mold and then allowed to reform.
What are the 3 types of diffusion?
simple diffusion, osmosis and facilitated diffusion.
What is the difference between diffusion and facilitate diffusion?
The difference between diffusion and facilitated diffusion is that facilitated diffusion is that the molecules pass through special protein channels.
What is the process of spreading new ideas called?
Diffusion is the process of spreading new ideas from culture to culture. Examples of diffusion include the use of cars and the smelting of iron. There are five main types of diffusion they are: Expansion diffusion, Relocation diffusion, Hierarchal diffusion, Congious diffusion and Stimulus diffusion.
