# How does matter change when it is heated or cooled?

Mar 18, 2018

Just to retire this question....

#### Explanation:

...typically matter goes from a condensed phase, a solid or liquid, when heated, to a gas...

$\text{Solid"+Delta_1stackrel("melting")rarr"Liquid"+Delta_2stackrel("boiling")rarr"Gas}$

And the reverse applies when the matter is cooled....

$\text{Gas"stackrel("condensation")rarr"Liquid"+Delta_2stackrel("fusion")rarr"Solid} + {\Delta}_{1}$