Question

Define latent heat of fusion and latent heat of vaporization. Class 9.

Answer 1

heya mate here is your answer

•LATENT HEAT OF FUSION- the amount of heat energy required to change 1kg of solid into liquid under the given atmospheric pressure at it's melting point is called latent heat of fusion

• LATENT HEAT OF VAPORIZATION- the amount of heat energy required to change 1 kg of liquid into gas at the given atmospheric pressure at it's boiling point is called latent heat of vaporization

hope this helps you

Answer 2

Hey dear ‼

Here is your answer :-

▶ Latent Heat Of Fusion :-

⚛The amount of heat energy which is needed to convert 1 kg of solid into liquid, at room temperature, at atmospheric pressure at its melting point, is known as *Latent* *Heat* *of* *Fusion*

For example ↪ Latent heat of Fusion of ice is 335kJkg^-1.

▶Latent heat of vapourisation :-

✡ The amount of heat energy which is needed to convert 1000 mL of liquid into vapours at its boiling point, it is known as it's *latent* *heat* *of* *vapourisation*.

For example ↪ Particles of steam, i.e. water vapours at 373 K or 100°C have higher energy than water(in liquid state) at the same temperature.
This is because water vapours in the form of steam in gaseous state which have absorbed certain amount of extra energy in the form of latent heat of vapourisation.

✌Hope this helps you dear ✌