Do diffusion and osmosis require energy to occur?

No, diffusion is a spontaneous mechanism and doesn't require energy. Let's look at the basic definitions: Diffusion: Movement of particles from high concentration regions to low concentration. read more

No, diffusion is a spontaneous mechanism and doesn't require energy. Let's look at the basic definitions: Diffusion: Movement of particles from high concentration regions to low concentration. read more

Osmosis occurs when there is a high solute concentration area on one side of a membrane and a low solute concentration area on the other. The higher the temperature, the faster that osmosis occurs. This is due to the amount of energy present in the water, as energy is expended to permeate the membrane. read more

No, both are examples of passive transport. Diffusion and osmosis are both examples of passive transport which do not require energy. Here is a video which describes how osmosis impacts onion cells placed into tap water and then into a salt water solution. read more