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Molecular diffusion, often simply called diffusion, is the thermal motion of all (liquid or gas) particles at temperatures above absolute zero. The rate of this movement is a function of temperature, viscosity of the fluid and the size (mass) of the particles. Diffusion explains the net flux of molecules from a region of higher concentration to ...
1. The rate of diffusion depends on temperature, the size and shape of the molecules, and the viscosity of the solvent. Figure 12.4.1 12.4. 1: Molecular diffusion. A microscopic picture of diffusion is shown on the left, and a macroscopic view is pictured on the right. The red circles represent the solute molecules, which move randomly due to ...
Feb 13, 2023 · 3.2.4: Rate of Diffusion through a Solution. Page ID. Diffusion in a gas is the random motion of particles involved in the net movement of a substance from an area of high concentration to an area of low concentration. Each particle in a given gas continues to collide with other particles. In regions of the gas where the particle density is the ...
Feb 16, 2020 · About the Author. Diffusion occurs when particles move from an area of high concentration to an area of low concentration. The factors affecting rate of diffusion are: concentration, temperature, mass of the particle and properties of the solvent in which diffusion occurs. Faster movement equals faster diffusion.
Jul 12, 2023 · Exercise 1: Molecular Weight and Diffusion Rate. Molecular weight is an indication of the mass and size of a molecule. The purpose of this experiment is to determine the relationship between molecular weight and the rate of diffusion through a semisolid gel. You will investigate two dyes, methylene blue and potassium permanganate.
Oct 4, 2019 · Diffusion is affected by temperature, area of interaction, steepness of the concentration gradient and particle size. Each of these factors, independently and collectively can alter the rate and extent of diffusion. Temperature. In any system, molecules are moving with a certain amount of kinetic energy.
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The net rate of diffusion is also proportional to the diffusion constant D D, which is determined experimentally. The farther a molecule can diffuse in a given time, the more likely it is to leave the region of high concentration. Many of the factors that affect the rate are hidden in the diffusion constant D D.
