Diffusion

 Diffusion questions and answers 

Q: What is diffusion?

A: Diffusion is the process by which molecules or particles move from an area of higher concentration to an area of lower concentration, driven by the natural tendency to achieve equilibrium.

Q: How does temperature affect diffusion?

A: Higher temperatures generally increase the rate of diffusion because particles gain more kinetic energy, leading to more frequent and energetic collisions.

Q: What role does surface area play in diffusion?

A: Larger surface areas facilitate faster diffusion as there is more area for molecules to interact with, allowing for a greater exchange of particles between regions.

Q: Can diffusion occur in solids?

A: Yes, diffusion can occur in solids, although at a slower rate compared to liquids and gases. In solids, it involves the movement of particles within the fixed structure of the material.

Q: How does concentration gradient impact diffusion?

A: The steeper the concentration gradient (the greater the difference in concentration between two areas), the faster the rate of diffusion. A larger gradient results in a more rapid movement of particles.

Q: Give an example of diffusion in everyday life.

A: A common example of diffusion is the spreading of perfume scent in a room. The molecules move from an area of higher concentration (near the source) to areas of lower concentration.

Q: What is facilitated diffusion?

A: Facilitated diffusion is a type of passive transport where specific proteins assist the movement of molecules across a cell membrane, following the concentration gradient.

Q: How does diffusion differ from osmosis?

A: Diffusion is the movement of any type of particle, while osmosis specifically refers to the movement of water molecules across a selectively permeable membrane.

Q: Can diffusion occur without a concentration gradient?

A: No, diffusion relies on a concentration gradient. Without a difference in concentration between two regions, there is no driving force for the movement of particles.

Q: What factors affect the rate of diffusion in gases?

A: Temperature, molecular mass, and pressure are key factors affecting the rate of diffusion in gases. Higher temperatures and lower molecular masses generally result in faster diffusion.