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Melting Point vs. Freezing Point: What's the Difference?

Edited by Aimie Carlson || By Janet White || Published on January 20, 2024
Melting point is the temperature at which a solid becomes a liquid, while freezing point is the temperature at which a liquid becomes a solid.

Key Differences

The melting point is the temperature at which a solid turns into a liquid. In contrast, the freezing point is the temperature at which a liquid solidifies into a solid.
During the melting point, energy is absorbed by the solid to overcome molecular bonds. At the freezing point, the liquid releases energy as it forms molecular bonds to become a solid.
The melting point of a substance is a key indicator of its purity; impurities lower the melting point. The freezing point can also be affected by impurities, typically resulting in a depression of the freezing temperature.
The melting point is crucial in characterizing substances in chemistry and material science. The freezing point is significant in fields like meteorology and food preservation, indicating when liquids will solidify.
In daily life, the melting point is observed in activities like cooking or melting ice. The freezing point is commonly discussed in weather forecasts, especially in the context of ice formation.

Comparison Chart

Phase Change

Solid to liquid
Liquid to solid

Energy Dynamics

Absorption of energy
Release of energy

Purity Indicator

Impurities lower the melting point
Impurities lower the freezing point

Measurement Relevance

Important in material characterization
Crucial in meteorology, food preservation

Everyday Examples

Ice melting in sunlight
Water freezing in a freezer

Melting Point and Freezing Point Definitions

Melting Point

Measured during substance characterization.
The melting point of a new compound helps identify its properties.

Freezing Point

Observed in natural and artificial cooling processes.
The freezing point of juices determines their storage conditions.

Melting Point

Temperature at which a solid turns into a liquid.
The melting point of ice is 0°C, where it turns to water.

Freezing Point

Vital in food storage and preservation.
Understanding the freezing point of liquids is essential in freezer technology.

Melting Point

Indicates the purity of a substance in chemistry.
A pure substance has a consistent melting point.

Freezing Point

Temperature at which a liquid becomes a solid.
The freezing point of water is 0°C, forming ice.

Melting Point

Observed in daily life phenomena.
The melting point of chocolate is important in baking.

Freezing Point

Influenced by the presence of impurities.
Saltwater has a lower freezing point than pure water.

Melting Point

A key property in material science.
Metals with high melting points are used in high-temperature applications.

Freezing Point

Important in weather prediction.
Freezing points are crucial in forecasting ice formation.


What is the freezing point?

It's the temperature at which a liquid turns into a solid.

How do impurities affect freezing point?

They typically lower the freezing point.

Does freezing point change with atmospheric pressure?

Yes, it can vary slightly with pressure changes.

What is the melting point?

It's the temperature at which a solid becomes a liquid.

Why is melting point important in chemistry?

It helps determine purity and identify substances.

Is the melting point used in material science?

Yes, for assessing material properties and stability.

What's the melting point of water?

It's 0°C under standard atmospheric conditions.

Are melting and freezing points the same for a substance?

Yes, for a pure substance, they are typically the same.

How does impurity affect melting point?

Impurities usually lower the melting point.

Can melting point vary with pressure?

Yes, it can change under different pressures.

How is the freezing point relevant in food preservation?

It determines the storage conditions for perishables.

What's the significance of freezing point in meteorology?

It's vital for predicting ice and frost formation.

Do all substances have a melting point?

Most solids have a specific melting point.

How is melting point measured?

Typically with a melting point apparatus in a lab.

How is freezing point determined?

By cooling a liquid and observing the temperature of solidification.

Is the freezing point important in climate studies?

Yes, especially in understanding ice cap and glacier dynamics.

What's the freezing point of water?

Also 0°C under standard atmospheric conditions.

Can we alter the melting point of a substance?

Yes, by adding impurities or changing the pressure.

Can melting point indicate a compound's stability?

Yes, higher melting points often indicate greater stability.

Do all liquids have a freezing point?

Yes, but it can vary widely among different liquids.
About Author
Written by
Janet White
Janet White has been an esteemed writer and blogger for Difference Wiki. Holding a Master's degree in Science and Medical Journalism from the prestigious Boston University, she has consistently demonstrated her expertise and passion for her field. When she's not immersed in her work, Janet relishes her time exercising, delving into a good book, and cherishing moments with friends and family.
Edited by
Aimie Carlson
Aimie Carlson, holding a master's degree in English literature, is a fervent English language enthusiast. She lends her writing talents to Difference Wiki, a prominent website that specializes in comparisons, offering readers insightful analyses that both captivate and inform.

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