A solid with a molecular weight of 174.0 g/mol is at its melting point. If this solid requires 21.3 kJ of heat to melt 34.0 g, what is the molar heat of fusion of this solid (in kJ/mol)

Question

Quizplus · Accepted Answer

The molar heat of fusion is calculated by dividing the heat required to melt the sample by the number of moles of the sample. First, calculate the moles of the solid: 34.0 g / 174.0 g/mol = 0.1954 mol. Then, divide the heat by the moles: 21.3 kJ / 0.1954 mol = 109 kJ/mol.

A Solid with a Molecular Weight of 174