Question

What is the unit of standard enthalpy of fusion or molar enthalpy of fusion?

(a) KJ Mol

(b) KJ per Mol

(c) Mol per KJ

(d) 1/KJ Mol

The question was asked in a job interview.

My question is taken from Thermodynamics in division Thermodynamics of Chemistry – Class 11

Answer 1

The correct choice is (b) KJ per Mol

To explain: The enthalpy change that occurs during melting of one mole of a solid substance in the standard state is called standard enthalpy of fusion or molar enthalpy of fusion, it is represented by the symbol ΔfusH^–, the units of this are KJ per Mol.