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 of 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
More energy is required to convert the substance from liquid phase to vapor phase than to convert it from solid to liquid phase. So latent heat of vaporisation of a substance is always greater than its 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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