Which of the following best describes the heat absorbed when a solid melts at constant temperature (at its melting point)? a. heat of fusion b. specific heat c. heat capacity d. freezing point

The correct answer is a. heat of fusion.<br /><br />The heat of fusion is the amount of heat required to change the state of a substance from solid to liquid (or vice versa) at its melting point without changing its temperature. It represents the energy needed to overcome the intermolecular forces holding the solid together, allowing it to transition into a liquid state.