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Question

A quantity of heat required to change the unit mass of a solid substance, from solid state to liquid state, while the temperature remains constant is known as

A
latent heat of condensation
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B
latent heat of fusion
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C
latent heat of vaporisation
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D
latent heat of sublimation
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Solution

The correct option is B latent heat of fusion
A quantity of heat required to change the unit mass of a solid substance, from solid state to liquid state, while the temperature remains constant, is known as latent heat of fusion.

A quantity of heat released to change the unit mass of a liquid substance, from liquid state to solid state, while the temperature remains constant, is known as latent heat of condensation.

A quantity of heat required to change the unit mass of a liquid substance, from liquid state to vapour state, while the temperature remains constant, is known as latent heat of vapourisation.

A quantity of heat required to change the unit mass of a solid substance, directly from solid state to vapor state, while the temperature remains constant, is known as latent heat of sublimation.

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