Latent Heat

Question 1

What is change of state

Answer 1

Reversible changes in matter

The matter’s chemical properties and molecular composition do not change

Question 2

Change of state: Absorption or release of energy (Solid to Liquid)

Answer 2

When a solid reaches melting point, the particles gain energy and are able to partly overcome the force of attraction between them

They no longer stay in a fixed position.

Question 3

Change of state: Absorption or release of energy (Liquid to Gas)

Answer 3

Particles gain enough energy to completely overpower the intermolecular forces of attraction.

Question 4

Change of state: Absorption or release of energy

Answer 4

At certain temperatures, a change of state occurs instead of an increase in temperature when heating an object.

Question 5

What is latent heat

Answer 5

During a change of state, a substance absorbs or releases heat but temp remains the same.

This is called latent heat

Latent heat fusion - Melting

Latent heat vaporisation - Turning into gas

Question 6

Formulae

Answer 6

Q=mL

L = Latent heat of fusion or vaporisation