During Diffusion,molecules _____

Question

During diffusion,molecules _____.
A)move from hotter areas to cooler areas
B)move from areas of higher concentration to areas of lower concentration
C)move from areas of lower concentration to areas of higher concentration
D)expend energy to more around

Accepted Answer

Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration, resulting in the uniform distribution of the substance. This movement occurs due to the random motion of particles and does not require the expenditure of energy. Therefore, option B is correct. Options A and C are incorrect because diffusion does not depend on the temperature gradient, and particles do not move from lower to higher concentration areas. Option D is incorrect because diffusion is a passive process that does not require any energy input.