Unit 3- MRS CONNOLY'S WORK

Kinetic Theory:

What is the particle arrangement, movement and relative energy of a solid, liquid and gas.

Solid:

• PA- regular fixed arrangement

• PM- Vibrates about, fixed position

• RE- Low

Liquid:

• PA- irregular

• PM- freely over each other

• RE- intermediate

Gas:

• PA- irregular

• PM- constant random motion

• RE- high

Kinetic Theory:

What is diffusion?

Diffusion is the net movement of particles from an area of a high conc to an area of a low conc

Kinetic Theory:

Describe the process of diffusion

• Diffusion is a passive process

• It does not require energy input for the process

• Particles move down the conc gradient

• Eventually a dynamic equilibrium is reached which means stables concs, but particles are still moving

What are the factors affecting the rate of diffusion

1. SA to vol ratio (As an object gets bigger, the SA : VOL ratio gets smaller

2. Temp

3. Molecule size

4. Conc gradient

How does temp link to kinetic energy?

• The higher the temp, the more KE the particles will have

• So, the faster they will move