Question:

Does diffusion happen faster in a hot or cold liquid?

by Guest7594  |  11 years, 2 month(s) ago

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I want to know about the process of diffusion. Does diffusion happen faster in a hot or cold liquid? Please help me!

 Tags: cold, Diffusion, faster, happen, Hot, Liquid

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2 ANSWERS

  1. James Augustus

    In hot water, diffusion takes place with faster speed than cold water. Diffusion is the spread of particles through random motion from regions of higher concentration to regions of lower concentration. The time dependence of the statistical distribution in space is given by the diffusion equation. The concept of diffusion is tied to that of mass transfer driven by a concentration gradient, but diffusion can still occur when there is no concentration gradient (but there will be no net flux). Diffusion is used in the social sciences to tell the spread of ideas.
    In molecular diffusion, the moving entities are small molecules which are self propelled by thermal energy and do not require a concentration gradient to spread out through random motion. They move at random because they frequently collide. Diffusion is this thermal motion of all (liquid and gas) molecules at temperatures above absolute zero. Diffusion rate is a function of only temperature, and is not affected by concentration. Brownian motion is observed in molecules that are so large that they are not driven by their own thermal energy but by collisions with solvent particles.


    Other types of diffusion
    • Anisotropic diffusion, also known as the Perona-Malik equation, enhances high gradients
    • Atomic diffusion, in solids.
    • Eddy diffusion, in coarse-grained description of turbulent flow
    • Effusion of a gas through small holes.
    • Electronic diffusion, resulting in an electric current called the diffusion current.
    • Facilitated diffusion, present in some organisms.
    • Gaseous diffusion, used for isotope separation
    • Heat equation, diffusion of thermal energy.
    • Itō diffusion, mathematisation of Brownian motion, continuous stochastic process.
    • Knudsen diffusion of gas in long pores with frequent wall collisions
    • Momentum diffusion, ex. the diffusion of the hydrodynamic velocity field
    • Osmosis is the diffusion of water through a cell membrane.
    • Photon diffusion
    • Reverse diffusion, against the concentration gradient, in phase separation
    • Rotational diffusion, random reorientations of molecules
    • Surface diffusion, diffusion of adparticles on a surface
     

  2. Guest5171365
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