The enthalpy of fusion is:
A)the quantity of heat required to melt one mole of a solid
B)the quantity of heat released when a solid melts
C)the quantity of heat when two elements are fused together to produce binary compound
D)the quantity of heat required to fuse two atomic nuclei
E)the quantity of heat released when an organic compound burns in an atmosphere of pure oxygen

Question

Quizplus · Accepted Answer

The enthalpy of fusion is defined as the amount of heat required to melt one mole of a solid at its melting point, while maintaining its temperature constant. Therefore, option A is the correct choice. Option B is incorrect, as it describes the enthalpy of solidification, which is the opposite process. Option C is incorrect, as it describes the enthalpy of formation of a binary compound, which is a different thermodynamic quantity. Option D is incorrect, as it describes the energy released by nuclear fusion, which is a different type of reaction. Option E is incorrect, as it describes the enthalpy of combustion of an organic compound, which is again a different thermodynamic quantity.

The Enthalpy of Fusion Is