Heating And Cooling Grapha

Question 1

What does a straight line after a diagonal line mean in a graph

Answer 1

At this point, the solid is changing state and turning into a liquid (melting).

Question 2

What’s allowing the substance to change from solid to liquid

Answer 2

The energy we are putting in is weakening or breaking the forces of attraction between the particles

Question 3

What is the latent heat

Answer 3

the energy needed for a substance to change state

Question 4

What’s happening during the change of state

Answer 4

we are increasing the internal energy store of the system but we are NOT changing the temperature.

Question 5

When does the temperature start to rise again

Answer 5

When all of the solid has melted into a liquid

Question 6

What’s happening when the line stops increasing and becomes horizontal again

Answer 6

The substance is boiling. The energy we are putting in is weakening or breaking the forces of attraction between the particles.

Question 7

When does the temperature start to rise again

Answer 7

Once all of the liquid has boiled