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Question

The latent heat of vaporization of a substance is always

A
greater than its latent heat of fusion
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B
greater than its latent heat of sublimation
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C
equal to its latent latent heat of sublimation
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D
less than its latent heat of fusion
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Solution

The correct option is A greater than its latent heat of fusion
This is because more heat is absorbed to overcome the attractive intramolecular forces between particles and also to do work against the atmospheric pressure so that water can be changed into vapour.

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