Final answer:
The enthalpy of fusion is the amount of heat required to change a substance from the solid state to the liquid state. Ethyl alcohol has a specific enthalpy of fusion, also known as the heat of transformation, to undergo this change.
Step-by-step explanation:
The amount of heat required to change one mole of a substance from the solid state to the liquid state is called the enthalpy of fusion or heat of fusion. When a substance undergoes fusion (melting), it is an endothermic process, meaning heat is absorbed. The enthalpy of fusion for ethyl alcohol is the heat of transformation associated with the change from a solid to a liquid state.