Question

what happens to the temperature of a substance as it changes phases? it increases. it remains constant. it decreases. it increases or decreases, depending on the phase change.

Explanation:

During a phase change, the heat energy is used to break or form intermolecular forces rather than increasing or decreasing the kinetic energy of the molecules. Since temperature is a measure of the average kinetic energy of molecules, it remains constant during phase change.

Answer:

It remains constant.