Phase change or change of state and energy Phase changes always occur with a change in the average amount of energy in a system. This energy is absorbed by the material from the surroundings during a phase change or is released to the surroundings by the material during the phase change. However, although the energy content of the material changes, the temperature of the material does not change during a phase change Part D Classify the following phase changes as exothermic processes or endothermic processes Drag the appropriate items to their respective bins. View Available Hint(s) Exothermic process freezing deposition vaporizing melting subliming 4 Endothermic process condensing Reset Help