Topic 3 - Particle Model of Matter

Question 1

What is internal energy?

Answer 1

The total energy particles have in their kinetic and potential energy stores.

Question 2

What is it called when a solid turns into a gas, and when a gas turns into a solid?

Answer 2

1. Sublimation
2. Deposition

Question 3

What does Specific latent heat of fusion mean?

Answer 3

The energy required to change 1kg of sollid to liquid or vice versa, without changing temperature.

Question 4

What does specific latent heat of vapourisation mean?

Answer 4

The energy required to change 1kg of liquid into gas or vice versa, whithout changing temperature.

Question 5

What is the equation linking Energy, mass and specific latent heat?

Answer 5

energy = mass x specific latent heat

E = m x Lf or Lv

Question 6

How do gasses cause pressure?

Answer 6

Gas particles collide with the walls of the container, this creates a force at right angles to the surface.

Question 7

What is Boyle’s Law

Answer 7

pressure x volume = constant

pV = constant

Question 8

What is the relationship between pressure and volume?

Answer 8

They are inversely proportional.