Chemistry
Chemistry
Problem
Among the following, which has the lowest enthalpy of fusion ? a. Fluorine b. Hydrogen c. Chlorine d. HeliumIntuitive explanation
Enthalpy of fusion measures how much energy you need to break apart the solid structure and let particles move freely as a liquid. Substances with weaker intermolecular forces—like those held together by dispersion forces rather than hydrogen bonds or ionic attractions—require less energy to melt. Think of it as asking which solid is "easiest to break apart": the answer is whichever has the gentlest forces holding its particles in place.
Intuitive explanation
Enthalpy of fusion measures how much energy you need to break apart the solid structure and let particles move freely as a liquid. Substances with weaker intermolecular forces—like those held together by dispersion forces rather than hydrogen bonds or ionic attractions—require less energy to melt. Think of it as asking which solid is "easiest to break apart": the answer is whichever has the gentlest forces holding its particles in place.