P1.2 - Changes Of State

Question 1

What is the formula for density?

Answer 1

Mass/volume = density

Question 2

What is temperature?

Answer 2

A measure of the average kinetic energy of particles in a substance

Question 3

What is the relation between mass and energy required to heat it up?

Answer 3

The higher the mass the more energy needed

Question 4

What is specific heat capacity?

Answer 4

The heat energy required to raise the temperature of 1kg of substance by 1 Kelvin/ degree Celsius

Question 5

What is the difference between kinetic energy and potential energy?

Answer 5

Kinetic energy is the energy due to the motion of the particles
Potential energy is the energy due to the position of the particles

Question 6

What is the specific heat capacity formula?

Answer 6

E = m x c x theta
(Energy = mass x specific heat capacity x temperature)

Question 7

What is the specific latent heat?

Answer 7

The energy transferred when 1kg of a substance changes state

Question 8

What is the specific latent heat formula?

Answer 8

E = m x l
(Energy = mass x specific latent heat)

Question 9

What is the difference between specific heat capacity and specific latent heat?

Answer 9

Specific heat capacity is used during a temperature change, where kinetic energy changes
Specific latent heat is used during a state change, where potential energy changes