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Enthalpy of sublimation of a substance i...

Enthalpy of sublimation of a substance is equal to :

A

enthalpy of fusion `+` enthalpy of vaporisation

B

enthalpy of fustion

C

enthalpy of vaporisation

D

twice the enthalpy of vaporisation

Text Solution

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The correct Answer is:
a
Sublimation is `:` Solid`rarr` Vapour . Writing in two steps , we have
Solid`rarr` Liquid `rarr`Vapour . Solid `rarr` Liquid required enthalpy of fusion . Liquid`rarr`Vapour required enthalpy of vaporisation.
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