🧪ap chemistry review

∆Hfus

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

∆Hfus refers to the heat of fusion, which is the amount of energy required to change a substance from its solid state to its liquid state at its melting point. In other words, it is the heat absorbed or released when a substance undergoes fusion.

"∆Hfus" also found in: