Question

Molar heat of fusion is defined as ____________

(a) Energy required to melt one gram of solid

(b) Energy required to melt one mole of solid

(c) Energy required to melt one kilogram of solid

(d) Energy required to melt ten moles of solid

The question was asked in an interview.

My doubt is from Melting Point topic in section Criteria of Purity and Characterisation of Materials of Engineering Chemistry I

Answer 1

Correct option is (b) Energy required to melt one mole of solid

To explain I would say: Molar heat of fusion is defined as the energy required to melt one mole of solid at a given temperature. The molar heat of fusion refers to the enthalpy change per amount of substance in moles.