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.

Answers (1)

The answer is option (i) enthalpy of fusion + enthalpy of vapourisation

Explanation: In case of enthalpy of sublimation, solid converts to liquid and then to gas. In this process, the conversion to liquid required enthalpy of fusion and the conversion to vapour requires the enthalpy of vapourisation.

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