Enthalpy of sublimation of a substance
Question:

Enthalpy of sublimation of a substance is equal to

(i) enthalpy of fusion + enthalpy of vapourisation

(ii) enthalpy of fusion

(iii) enthalpy of vapourisation

(iv) twice the enthalpy of vapourisation

Solution:

Option (i) enthalpy of fusion + enthalpy of vapourisation is the answer.

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