The temperature at which a substance changes from a solid to a liquid is called what?

The temperature at which a substance changes from a solid to a liquid is called what?

• A. Boiling point
• B. Freezing point
• C. Melting point
• D. Absolute zero

Answer: (C)

Melting point is the temperature at which a solid becomes a liquid. At this temperature, added energy overcomes the forces holding the particles in a fixed arrangement, allowing them to flow past one another. For pure crystalline substances, this melting point is sharp; for mixtures, it may occur over a range. Boiling point is the temperature at which a liquid becomes a gas, freezing point is when a liquid becomes a solid, and absolute zero is the lowest theoretical temperature where molecular motion almost stops.

Melting point is the temperature at which a solid becomes a liquid. At this temperature, added energy overcomes the forces holding the particles in a fixed arrangement, allowing them to flow past one another. For pure crystalline substances, this melting point is sharp; for mixtures, it may occur over a range. Boiling point is the temperature at which a liquid becomes a gas, freezing point is when a liquid becomes a solid, and absolute zero is the lowest theoretical temperature where molecular motion almost stops.