Question

1. during a phase change, the temperature of a substance —

o increases
o stays the same
o decreases

Explanation:

During a phase change, the temperature of a substance remains constant. This is because the heat energy is used to break the intermolecular forces (for melting or vaporizing) or is released when forming intermolecular forces (for freezing or condensing) rather than increasing or decreasing the kinetic energy (which would change the temperature).

Answer:

stays the same