Which two phrases require the removal of heat energy

The two phases that require the removal of heat are when a liquid turns to solid (e.g. freezing)  and when a gas turns to liquid (e.g. condensation)

Heat will leave the liquid as it freezes, and heat will leave the gas as it condenses into liquid.

The change in phase of a substance will always involve a change of heat. Heat, which is energy, either comes into the material during the phase change or heat comes out of the material during this change.

However, although the heat content of the material changes, the temperature does not, it remains the same during the phase change.

this website is for anybody really not just for girls just saying, also while a lot of males are mean and you know there are the few who are kind and then there's the nice-guys but then theirs also guys like me who are shy we don't get out much because there are people like you who exist who would most likely punch a guy in the face so next time just think about things before you post them to a website where guys and girls can see your question.

compost can be added to topsoil as a:

pesticide