MHT CET 2024 Chemistry question

Under similar conditions enthalpy of freezing is exactly opposite to

(A)enthalpy of fusionCorrect
(B)enthalpy of vaporization
(C)enthalpy of solution
(D)enthalpy of atomization

Answer: (A)

Solution

Freezing (liquid solid) is the reverse of fusion (solid liquid). Enthalpy is a state function, so the enthalpy change of a reverse process is equal in magnitude and opposite in sign:

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Question ID VK-098942