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# How do the three states of matter change?

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seol Share
Jul 31, 2017

Matter changes phases via the addition or removal of heat.

• process: $\setminus \textcolor{n a v y}{s o l i d} \setminus \textcolor{\in \mathrm{di} a n red}{\setminus \rightarrow + h e a t} \setminus \Rightarrow \setminus \textcolor{s t e e l b l u e}{l i q u i d} \textcolor{\in \mathrm{di} a n red}{\setminus \rightarrow + h e a t} \setminus \Rightarrow \setminus \textcolor{r o y a l b l u e}{g a s}$
and vice versa

#### Explanation:

Matter changes phases (states) by either addition or removal of heat. For example, adding heat to ice causes it to melt. This creates water, a liquid. If you add even more heat, then the water will evaporate and become vapor, a gas.

Conversely, if you remove heat from gas, it will reverse back to a liquid (i.e. rainfall occurs in low temperatures); removing more will cause the liquid to freeze into a solid (i.e. ice on a winter day).

There are cases where a substance will skip the liquid phase and transition directly to gas when heat is added; this is called sublimation. Reversing the process is called deposition/desublimation.

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