Specific latent heat

Question 1

What is specific latent heat?

Answer 1

Specific latent heat is the amount of energy needed to change the state of 1 kilogram of a substance without changing its temperature

Question 2

What is specific latent heat of fusion

Answer 2

This is the energy needed to change 1 kilogram of a substance from a solid to a liquid at its melting point (or the energy released when 1 kilogram of a substance changes from a liquid to a solid at its freezing point)

Question 3

What is specific latent heat of vaporising

Answer 3

This is the energy needed to change 1 kilogram of a substance from a liquid to a gas (or vapor) at its boiling point (or the energy released when 1 kilogram of a substance changes from a gas to a liquid at its condensing point).

Question 4

Specific latent heat formula and what the symbols mean

Answer 4

E = m x L
E is the energy transferred (in Joules, J)
m is the mass of the substance (in kilograms, kg)
L is the specific latent heat (in Joules per kilogram, J/kg).

Question 5

How much energy is required to turn 1 kg of ice at 0°C into water at 0°C?

Answer 5

334 × 10^3 J

This process is known as the latent heat of fusion.

Question 6

How much energy is required to turn 1 kg of water at 100°C into steam at 100°C?

Answer 6

226 × 10^1 J

This process is known as the latent heat of vaporization.