Question

Which statement describes how a substance melts?(1 point)
Responses

Molecules in the substance gain kinetic energy and then become more tightly bound to each other.
Molecules in the substance gain kinetic energy and then become more tightly bound to each other.

Molecules in the substance gain kinetic energy and then become less tightly bound to each other.
Molecules in the substance gain kinetic energy and then become less tightly bound to each other.

Molecules in the substance lose kinetic energy and then become less tightly bound to each other.
Molecules in the substance lose kinetic energy and then become less tightly bound to each other.

Molecules in the substance lose kinetic energy and then become more tightly bound to each other.

Answer 1

Molecules in the substance gain kinetic energy and then become less tightly bound to each other.

Explanation: Adding heat increases molecular kinetic energy until intermolecular forces are overcome and the solid structure breaks down into a liquid where molecules move more freely.