C1.2: Diffusion

Question 1

What is diffusion?

Answer 1

The movement of particles in a fluid from an area of high concentration to an area of low concentration, until the concentrations are even throughout. Diffusion is a random process and affected by temperature, pressure and molecular mass.

Question 2

What is concentration?

Answer 2

Concentration is a measure of the number of particles in a given volume.

Question 3

What is a concentration gradient?

Answer 3

Whenever the concentration of a substance differs between two connected spaces, this difference is called a concentration gradient.

Question 4

What process is diffusion?

Answer 4

A passive process since it doesn’t need energy to happen.

Question 5

In which direction is diffusion moving on the concentration gradient?

Answer 5

Down the concentration gradient

Question 6

How does temperature effect the rate of diffusion?

Answer 6

Per the kinetic particle theory, the more thermal energy applied, the faster particles move, moving faster down the concentration gradient, increasing the rate of diffusion

Question 7

Which gas particles moves faster, particles with more mass or less mass?

Answer 7

Less mass, because it requires less kinetic energy to move them