List three characteristics that influence the rate of simple diffusion of small molecules. Solution Answer= Three characteristics that influence the rate of simple diffusion of small molecules 1] Particle size = Rate of diffusion is inversaly proportional to particle size Since the heat of environment is the energy source for diffusion the smaller particles moves at a faster rate than larger paricles at a given temperature 2] temperature = Rate of diffusion is directly proportional to temperature As temperature increses rate of diffusion also increases At high temp. particles move faster because more energy is available to diffuse them 3] Concentration difference = rate of increses as conc. difference increases The substance diffusing between 2 areas exibits a conc. diffference as the particle diffuse from one side of the wall to other side 4] particle distance = rate of diffusion is directly proportional to particle distance it takes longer for a particle to diffuse when it is further away than it does for a particle that is closer to the point of diffusion.