Question

What are 3 examples of diffusion?

Answer 1

Diffusion:

1. Diffusion is the movement of any substance from its higher concentration to its lower concentration by the random movement of ions or molecules of a substance.
2. Factors affecting its rate are as follows:
   1. Concentration gradient: The difference in concentration gradient is increased, thus the rate of diffusion gets faster.
   2. Distance b/w two regions: The distance b/w the two regions is increased thus the rate of diffusion gets faster.
   3. Area of the diffusion: The area over diffusion occurs is also increased thus the rate of diffusion gets faster.
   4. Size of the molecules: Small size molecules, thus rate of diffusion increases.
   5. Solubility: molecules are generally fat-soluble, and increase diffusion rate.
   6. Pores in the membrane: the size of the pores in the cell membrane is larger, thus the rate of diffusion faster.

Examples of diffusion:

1. A tea bag in a cup of water will diffuse water leading to a change in the color of the water.
2. When we add boiling water to the dried noodles, the water diffuses leading to rehydration and making dried noodles plumper and saturated.
3. Room freshener is sprayed in the air and the smell can be sniffed at a certain distance and reaches us by diffusion.