What is diffusion rate?
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Asked by: Johnathan Hossain
rate of diffusion=amount of gas passing through an areaunit of time. The diffusion rate depends on several factors: the concentration gradient (the increase or decrease in concentration from one point to another); the amount of surface area available for diffusion; and the distance the gas particles must travel.
What is meant by diffusion rate?
“Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration down the concentration gradient.”
Why is diffusion rate?
Rate of diffusion is faster in gas because inter molecular attraction is comparatively less in gases.So they are very free to move as compared to solid materials.
What is diffusion in simple words?
diffusion, process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration. A familiar example is the perfume of a flower that quickly permeates the still air of a room. ion diffusion across a semipermeable membrane.
What is diffusion rate equation?
The change in diffusing molecules over time is called the rate of diffusion. The diffusion rate of a gas is inverse to the square root of the volume (density). Hence, the rate of diffusion formula is: rate of diffusion α1√density.
What is diffusion and osmosis?
In diffusion, particles move from an area of higher concentration to one of lower concentration until equilibrium is reached. In osmosis, a semipermeable membrane is present, so only the solvent molecules are free to move to equalize concentration.
What is diffusion Class 9?
The process of movement of a substance (solid, liquid, or gas) from the region of higher concentration to the region of lower concentration so as to spread uniformly is called diffusion.
What is rate of diffusion Class 9?
The rate of diffusion increases with increase in temperature and decreases with decrease in temperature. Diffusion takes place because of the movements of particles of matters. The increase in temperature increases the kinetic energy, which increase the speed of movement of particles of matter.
What is rate of diffusion in liquid?
The rate of diffusion of liquids is higher than that of solids. This is due to the fact that in the liquid state, particles move freely and have greater space between each other as compared to particles in the solid state.
What is rate of diffusion of gas?
directly proportional to the square root of its molecular weight.
What is rate of diffusion in physics?
Diffusion is the movement of molecules from higher concentration region to a lower concentration region under a concentration gradient. The movement of molecules continues until the concentration becomes equal. The diffusion depends on certain factors: Density or molecular mass of the gas. Pressure of the gas.
What does diffusion rate depend on?
The greater the difference in concentration, the quicker the rate of diffusion. The higher the temperature, the more kinetic energy the particles will have, so they will move and mix more quickly. The greater the surface area, the faster the rate of diffusion.
What is the unit of diffusion?
The SI units for the diffusion coefficient are square metres per second (m2/s).
What is diffusion length?
The diffusion length of a carrier type in a material can be defined as the average distance that an excited carrier will travel before recombining. The diffusion length can be defined as follows: where D is the diffusion coefficient and τ is the lifetime of the excited carrier.
What is diffusion time?
The diffusion coefficient determines the time it takes a solute to diffuse a given distance in a medium. D has the units of area/time (typically cm2/s). Its value is unique for each solute and must be determined empirically.
