Latent Heat

Question 1

What happens to the temperature of a substance during phase change?

Answer 1

When a substance is heated, its temperature increases until a phase change begins. During the phase change, added heat is used to break bonds rather than raising temperature. After the change is complete, the temperature continues to rise.

Question 2

What is latent heat?

Answer 2

Latent heat is the energy required to change the state of a substance without changing its temperature.

Q=ml
Q=ml(v)

Question 3

What does Q=ml mean?

Answer 3

The specific heat of latent fusion (Lf)of a substance is the quantity of heat energy required to convert one kilogram of the substance from solid to liquid state without change in temperature

Question 4

What does Q=ml(v) mean?

Answer 4

The specific heat of latent vaporisation (Lv)of a substance is the quantity of heat energy required to convert one kilogram of the substance from liquid to gas state without change in temperature