Question

Write an activity to show that rate of diffusion increases with temperature

Answer 1

Diffusion is the passive movement of substances from a region of higher concentration to a region of lower concentration. Diffusion of substances plays an important role in cellular transport in plants. Rate of diffusion is affected by concentration gradient, membrane permeability, temperature, and pressure. Diffusion takes place as long as there is a difference between the concentrations of a substance across a barrier. However, diffusion stops, when the concentrations of the substance on either side of the barrier become equal. The permeability of a membrane affects the rate of diffusion. Diffusion rate increases as membrane permeability increases. Changes in temperature and pressure values also affect the diffusion of substances. Pressure plays an important role in the diffusion of gases as gases diffuse from a region of higher partial pressure to a region of lower partial pressure.

Answer 2

Take 2 beaker,some water ,potassium permagnate,one tripod stand,one burner Take one beaker with water and put a piece of potassium permagnate but do not stir or disturb it take another beaker and heat the water in it We can observe that in the first beaker the potassium permagnate(solute )took more time to dissolve whereas in the second beaker the solute diffused at greater speed This is because the heat which is applied increses the kinetic energy of the particles i.e the movement of particles increases and this helps to increase the rate of diffusion