Question

the movement of particles from an area of higher to lower concentration is called

Answer 1

The movement of particles from an area of higher to lower concentration is called diffusion.

• Diffusion is defined as movement of individual molecules of any substance through a semipermeable barrier from an area of higher concentration to an area of lower concentration. Diffusion is driven due to gradient in Gibbs free energy or chemical potential.
• Diffusion is observed in liquids and gases because molecules move around at random speed and direction. That's why they clash and shift direction, resulting in a passive mode of transportation.

Example, when a perfume or room freshener is sprayed, it will be spread into the air, and we will be able to detect it. Here, where it is sprayed, has the higher concentration and the air has lower concentration. So, the scent of the perfume is diffused from higher concentration to lower, this is why we able to smell it from little afar.

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