Question

The enthalpy change for the reaction; \[\ce{Na_{(s)} -> Na_{(l)}}\] is called enthalpy of ____________.

Options

• vapourization

• fusion

• combustion

• sublimation

Answer 1

The enthalpy change for the reaction; \[\ce{Na_{(s)} -> Na_{(l)}}\] is called enthalpy of fusion.

Explanation:

The enthalpy change in transforming 1 mole of a substance from solid to liquid at its freezing point is called enthalpy of fusion.