Question

multiple choice question
which of the following is true regarding the latent heat of fusion during melting?
it is used to break molecule - to - molecule bonds.
it originates from the melting object.
it is used to increase the temperature of the object.

Explanation:

• Latent heat of fusion is the heat energy required to change a solid into a liquid at its melting point.
• During melting, this heat is used to break the intermolecular (molecule - to - molecule) bonds in the solid, not to increase the temperature (temperature remains constant during phase change).
• The heat does not originate from the melting object; it is supplied to the object (e.g., from a surrounding heat source).

Answer:

It is used to break molecule - to - molecule bonds.