Question

Which of the following statements is true? The melting and freezing points of a substance are the same. The melting and boiling points of a substance are the same. The freezing and boiling points of a substance are the same. The heat of fusion and the heat of vaporization for a substance are the same.

Answer 1

The melting and freezing points of a substance are the same.

Substances melt and freeze at the same temperature. Hope this helps! :)

Answer 2

The melting and freezing points of a substance are the same

Step-by-step explanation:

Melting occurs when the state of a substance changes from solid to liquid, while freezing occurs when the state of a substance changes from liquid to solid. Therefore, melting and freezing are one the inverse process of the other: it means that they occur at the same temperature.

For instance, the melting point of ice (at standard pressure) is
`0^(\circ)`, and the freezing point of water is at the same temperature,
`0^(\circ)`.