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662 HAZWOPER for General Site Workers III
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Melting Point

The temperature at which a solid changes phase to a liquid is its melting point. This temperature is also the freezing point since a liquid can change phase to a solid.

Melting Points of Substances
  • If a substance has been transported at a temperature that maintains a solid phase, then a change in temperature may cause the solid to melt.
  • The substance may exhibit totally different properties in each of its phases. One phase could be inert while the other phase is highly reactive. Therefore, it is imperative to recognize the possibility of a substance changing phase due to changes in ambient temperature.

Knowledge Check Choose the best answer for the question.

3-6. The temperature at which a solid turns into a liquid is called its _____.