Specific Latent Heat

Question 1

Why doesn’t the temp of the substance keep rising even when energy is being transferred through melting or boiling

Answer 1

You’re still putting in energy and increasing internal energy but the energy used for breaking intermolecular bonds rather than increasing the temperature

Question 2

What happens to a substance’s internal energy store when it’s condensing or freezing

Answer 2

Bonds are forming between particles, which releases energy, this means internal energy decreases but the temp doesn’t go down until all the substance has turned to liquid or a solid

Question 3

What is the energy needed to change the state of a substance called

Answer 3

Latent heat

Question 4

What is specific latent heat

Answer 4

Amount of energy needed to change 1kg if it from to another without changing its temperature

Question 5

What is the process called for changing between a solid and a liquid

Answer 5

Specific latent heat of fusion

Question 6

What is the process called for changing between a liquid and a gas

Answer 6

Specific latent heat of vaporisation

Question 7

What is the formula for specific latent heat

Answer 7

Energy= mass x specific latent heat

Mass in kg
SLH in j/kg