Why do changes of states matter?

1 Answer
Aug 25, 2015

It is important to know when and how elements and compounds change state in order to use them.


You can't drink solid or vapor water. You need it in a liquid state. Similarly, other compounds are more useful in a particular state. The important part of state changes is the amount of energy that must be added or taken out to change the state.

The temperature of a phase change remains constant while the energy is exchanged. Only when all of the compound is in a particular state will a change in energy input change the temperature of the compound.

This is the basis of both the steam engine and air conditioning systems.