The temperature at which is required for a substance to melt is the same temperature for the same substance to do undergo...

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1. Write two applications of change of state of matter.

• a) Refrigeration: The evaporation and condensation of a refrigerant (change from liquid to gas and back) are used to cool spaces and preserve food.
• b) Casting of metals: Metals are melted (solid to liquid) and poured into molds, then allowed to solidify (liquid to solid) to form desired shapes.

2. The temperature at which is required for a substance to melt is the same temperature for the same substance to do undergo...

The temperature at which a substance melts is the same temperature for the same substance to undergo freezing (or solidification). This temperature is known as the melting point or freezing point.

3. Identify two changes of state of matter that require a decrease in temperature?

• a) Condensation: The change of state from a gas to a liquid.
• b) Freezing (or Solidification): The change of state from a liquid to a solid.

4. Values are found in the ______ and ______

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