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Moderate

Fusion and Vaporization

APCHEM-E3NZUX

In general, the molar heat of fusion for a substance is a smaller quantity than the molar heat of vaporization for the same substance.

The BEST explanation for this observation is which of the following?

A

Vaporization involves a greater change in molecular potential energy than does fusion.

B

Vaporization involves a greater change in molecular kinetic energy than does fusion.

C

Vaporization takes place at a higher temperature than fusion.

D

The intermolecular forces (IMF) in liquids are greater than the IMF in solids.