Question

What is diffusion? What effect does increase in temperature cause on rate of diffusion?

Answer 1

Hint: We need to know that the diffusion is explained on the basis of movement of particles. The diffusion is mainly divided into three types and that is, molecular diffusion, Brownian diffusion and turbulent diffusion. The molecular diffusion takes place in solids, liquids and the gases. This molecular diffusion is happening by the result of thermal motion of the molecules. And the diffusion is also divided into two types, which is simple diffusion and facilitated diffusion.

Complete answer:
We need to remember that diffusion is the process of movement of particles from a range of higher concentration to the lower concentration. This process occurs in all living beings. It will help with the movement of particles in and out from the cells. Until the concentration becomes equal, the movement of particles takes place from higher concentration to the lower concentration. The gases and liquids will undergo the diffusion. Because molecules can move randomly.
There are some factors affecting the diffusion and that is, temperature, size of the particle, area of interaction and steepness of the concentration gradient. The temperature is directly proportional to the diffusion. Because, when the temperature is increasing, the kinetic energy of the molecule is also increasing. It causes an increase in the average speed and movement of the molecule. Hence, the rate of diffusion is also increasing. And when the temperature is decreasing, there is decreasing the energy of the molecule, and movement of the molecules. So, average diffusion is decreasing. Thus, the diffusion increases with increasing temperature.

Note:
The movement of particles from the higher concentration to lower concentration is known as diffusion. The diffusion is mainly in two types and that is, simple diffusion and facilitated diffusion. In the case of simple diffusion, the particles move through a semipermeable membrane. And in the facilitated diffusion, the passive movement of molecules takes place. And it occurs across the cell membrane from higher concentration to lower concentration.