Question

why latent heat of fusion of ice is less than latent heat of vaporisation of ice ?​

Answer 1

Answer:

In the case of the latent heat of fusion it is the heat required to change a substance from a solid (ice) to a liquid (water) or vice versa while the latent heat of vaporization from a liquid (water) to a gas (steam) or vice versa. ... Because of this a gas can easily be compressed and take the shape of the container.

Explanation:

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Answer 2

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● The latent heat for a solid- liquid state change is known as latent heat of fusion and that for a liquid-gas state change is called latent heat of vaporization.

● The molecules of ice are very close together and the attraction between the molecules is very high. But in case of liquids, inter molecular attraction is less, compared to solids. But, still there are intermolecular attractive forces.

● In case of gases, the molecules are completely separated, and usually there is almost zero intermolecular attractive forces.

● Hence, the energy required to completely separate the molecules, moving from liquid to gas, is much greater than that required to change from solid to liquid. Because of this, the latent heat of fusion of ice is lesser than the latent heat of vaporization of water.