Question

Is energy required for each phase change?

Answer 1

no.

Step-by-step explanation:

lets me give some example of it.

• melting(solid to liquid) and boiling (liquid to gas) and sublimation (gas to solid or solid to gas) both need energy to break the intermolecular forces of attraction between the atoms
• condensation ( gas to liquid) and freezing (liquid to solid) lose in energy.

btw

i do not copy this answer from any other website

i do this with my own understanding

Answer 2

require a gain or a loss of heat energy

Step-by-step explanation:

so yes they do require energy for each phase. also keep in mind that . During a phase change energy my be added or subtracted from a system, but the temperature will not change.