Question

The change in phase of matter occurs with a change of:

• A. heat
• B. temperature
• C. number of atoms
• D. chemical properties

Answer 1

Answer: (A), (B)

The correct options are
A heat
B temperature

The changes of phase always occur with a change of heat. Heat, which is energy, either comes into the material during a change of phase or heat comes out of the material during this change. However, although the heat content of the material changes, the temperature does not.