Select the word from the list that best fits the definition, the amount of energy that is needed to melt 1 kg of a substance a. heat b. work c. entropy d. heat of fusion e. heat of vaporization

Heat of Fusion can turn a solid substance to a liquad substance

The amount of energy that is needed to melt 1 kg of a substance is known as heat of fusion

Explanation:

Fusion, as a physical process, can be represented as a phase transition (solid to liquid). Therefore, the latent heat of fusion is the change of enthalpy when a substance absorbs energy and passes from a solid state to a liquid at a constant pressure. The difference in intermolecular forces in a liquid phase has an internal energy much greater than a solid one, so solid substances need to absorb heat to melt them and become liquid

format change of dna.  

i believe the correct answer is d