P6 Molecules and matter

Question 1

What is the equation for density?

Answer 1

Density = Mass (kg) / Volume (m)

Question 2

What is density?

Answer 2

Density is the amount of mass per unit volume.

Question 3

How can a material change state?

Answer 3

Adding or removing energy.

Question 4

What is water’s boiling point?

Answer 4

100 degrees celsius.

Question 5

What is water’s freezing point?

Answer 5

0 degrees celsius.

Question 6

What is internal energy?

Answer 6

Internal energy is the total amount of kinetic energy and chemical potential energy of all the particles in the system.

Question 7

What is the equation for change in thermal energy?

Answer 7

Change in thermal energy = Mass x Specific heat capacity x Temperature change

Question 8

What is specific latent heat?

Answer 8

Specific latent heat is the amount of energy needed to change the state of 1 kilogram of a material without changing it’s temperature.

Question 9

What is the equation for change in thermal energy using specific latent heat?

Answer 9

Change in thermal energy = Mass x Specific latent heat