Home Chemistry Thermodynamics and Thermochemistry Heat of Reaction Enthalpy of sublimation of a substance is eq…
Chemistry Thermodynamics and Thermochemistry Heat of Reaction Single Correct MCQ
Published on: August 13, 2026

Enthalpy of sublimation of a substance is equal to.

A
Enthalpy of fusion + enthalpy of vapourisation
B
Enthalpy of fusion
C
Enthalpy of vapourisation
D
Twice the enthalpy of vapourisation.

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Text Solution

Verified by Experts
The correct answer is:
A

Solid Vapour

This process occurs in two steps,

Step 1 : Solid Liquid

Step 2 : Liquid Vapour

Thus, Enthalpy of sublimation = Enthalpy of fusion + Enthalpy of vaporisation.

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