Question

(a) Define the term 'latent heat of fusion' of a solid. How much is the latent heat of fusion of ice?
(b) Draw a labelled diagram of the experimental set-up to study the latent heat of fusion of ice.

Answer 1

(a) Definition of latent heat of fusion

The amount of heat required to change 1 g of a substance at the temperature of its melting point from the solid to the liquid state without changing temperature.

(b)

Answer 2

For ice the latent fusion heat is 334 kJ / kg. That means converting 1 kilo gram of ice at 0 ° C into 1 kilogram of water at 0° C needs a heat of 334 kJ.

Explanation:

(a) Latent fusion heat is identified as the heat amount needed at the melting point of the material to transform 1 kg of a solid material in to the state of liquid.

For ice the latent fusion heat is 334 kJ / kg. That means converting 1 kilo gram of ice at 0 ° C into 1 kilogram of water at 0° C needs a heat of 334 kJ.

(b) Experimental set-up to test ice melting latent heat:

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