The latent heat of vaporisation of a substance is always

greater than its latent heat of fusion

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greater than its latent heat sublimation

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equal to its latent heat of sublimation

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less than its latent heat of fusion

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Solution

The correct option is A greater than its latent heat of fusion
The energy required to completely separate the molecules, moving from liquid to gas is much greater than if you were just to reduce their separation, solid to liquid. Hence, the reason why the latent heat of vaporisation is greater than the latent heat of fusion.

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The latent heat of vaporization of a substance is always greater than its latent heat of fusion.

The latent heat of vaporization of a substance is always greater than its latent heat of sublimation.

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