Phase Changes endo/exo

[Emily Vainberg 1D]

Are any phase changes exothermic? All the ones we went over in class were endothermic.

[Ami_Pant_4G]

I believe freezing and condensing are exothermic. Hope this helps.

[smurphy1D]

Yes some phase changes are exothermic, as long as it is releasing heat.

[sbeall_1C]

Yes, some phase changes are exothermic. If you go from a system of higher energy to a system of lower energy, it will be an exothermic reactions. For example, going from a gas to a liquid in vaporization (or commonly called condensation) reaction, it is exothermic because the gas has a higher energy which must be released along with the formation of the liquid.