DIFFUSION

WHAT IS DIFFUSION

• Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration.

Application of diffusion in daily life

• You can smell perfume because it diffuses into the air and makes its way into your nose.
• Cigarette smoke diffuses into the air.
• Leave a soda bottle open and the carbon dioxide bubbles diffuse and leave it flat.

FACTORS WHICH EFFECT DIFFUSION

• 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.

HOW THESES FACTORS EFFECT DIFFUSION

• The concentration gradient: The greater the difference in concentration, the quicker the rate of diffusion.
• Temperature: The higher the temperature, the more kinetic energy the particles will have, so they will move and mix more quickly.
• Surface area: The greater the surface area, the faster the rate of diffusion.

ANY QUESTION?

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