What is the difference between melting and freezing answer?

Chemistry

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Melting Point vs Freezing Point
Comparison Table Between Melting and Freezing Point
What is Melting Point?
What is Freezing Point?
Main Differences Between Melting and Freezing Point

Difference between Melting point and Freezing point are in tabular form below –

Melting point	Freezing point
1) A melting point is Termed for the temperature On which a solid Converted into liquid.	Freezing point is termed for the temperature On which the liquid Converted into solid.
2) Pure, crystalline solid have characteristic of melting point.	Liquid have a characteristic of a freezing point.
3) Matter come in different states, the different forms and phases that are Assumed, comes in a solid state which give it fixed volume and shape.	in a freezing point it, give a fixed volume but does not have a definite shape and it has to adopt to the shape of the containers.
4) The melting point of a substance depends on the standard atmospheric pressure.	in freezing point pressure show a miner effect on a substance.
5) The melting point of a substance is the basis for the determination of its purity and the identification of compounds.	The freezing point of a substance is not basis for the determination of it’s purity and the identification of compound.
6) The melting point of a substance is a characteristic property.	the Freezing point of a substance have considered a characteristic property because there are substance that can be supercooled ar cooled beyond the freezing point without the formation of solid crystals.
7) Melting point in a solid state, gives it a fixed volume and shape.	Freezing Point of liquid, give it definite volume but do not give a defined shaped.
8) Example of melting point : The melting point of solid oxygen is -218.4 Degree celsius.	Example of freezing point : Supercooled liquid can be made by heating (NoCH3CO2)

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Melting vs Freezing Point

Matter comes in different states, the distinctive forms and phases that it acquires or assumes. It comes in a solid state which gives it a fixed volume and shape; in a liquid state which gives it a fixed volume but does not have a definite shape, and it has to adapt to the shape of its container; and a gas state which allows it to expand and occupy any volume available.

The state of matter depends on the pressure and temperature that are applied to it which allows its transition from one form or state to another with each decrease or increase in the pressure or temperature. Matter can be changed from a solid state to a liquid state by melting, and it can be changed from a liquid to a solid by freezing.
The melting point and freezing point of matter or a substance varies according to its components. The melting point of a substance is defined as the temperature at which a solid, when given enough heat, is turned into liquid depending on the purity of the substance and the pressure that is applied to it.

The freezing point of a substance is defined as the temperature at which matter or a substance is changed from its liquid state into solid. For some substances, the melting point is equal to or the same as its freezing point. For mixtures and organic compounds, however, the freezing point is lower than the melting point.

The melting point is considered as a characteristic property of a substance while the freezing point is not because there are substances that can be supercooled or cooled beyond the freezing point without the formation of solid crystals.
At the melting point, the solid and liquid phases of a substance are in equilibrium, that is, the chemical reaction and its reverse are at equal rates and do not change. The melting point of a substance depends largely on the standard atmospheric pressure while pressure only has a little effect on a substance’s freezing point.

Water, which is a pure substance, has the same melting and freezing points. But when it is mixed with other substances, it has a slower melting or freezing point. The melting point of a substance is the basis for the identification of pure substances and compounds.

Summary:

1.The melting point is the temperature at which a solid is changed into a liquid by applying heat and pressure while the freezing point is the temperature at which a liquid is changed into a solid. 2.While most substances, especially pure substances, have the same melting and freezing points. Some substances, like mixtures and compounds, have lower freezing points than their melting points. 3.The melting point of a substance depends on the standard atmospheric pressure while pressure has a minor effect on the freezing point of a substance. 4.The melting point of a substance is the basis for the determination of its purity and the identification of compounds while the freezing point is not.

5.The melting point of a substance is considered a characteristic property while the freezing point is not.

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The Melting point and Freezing point are both temperatures at which one state gets the change to another state. The actual compound at these temperatures gets converted into a different compound. The temperature defines which state will form into which state. A pure substance has a particular temperature at which the substance will attain its melting and freezing point.

Melting Point vs Freezing Point

The main difference between Melting Point and Freezing Point is Melting point occurs when the state of the substance changes from solid to liquid, but the Freezing point occurs when the liquid is changing into a solid when the heat of the substance is taken out. The melting point can be observed when temperature increases, and Freezing Point can be observed when temperature decreases.

Melting point occurs when the substance undergoes a change in its state and turns solid to liquid. Heat is given to the substance. As the temperature rises in the solid, it starts melting, and at a temperature, it fully gets converted into the liquid

The Freezing point occurs when the substance undergoes changes and gets converted from liquid to solid. When the temperature decreases in the liquid, it starts forming solid. It completely forms solid when it reaches its freezing point. The substance freezes and melts at the same temperature.

Comparison Table Between Melting and Freezing Point

Parameters of Comparison	Melting Point	Freezing Point
Definition	Solid turns liquid at a particular temperature.	Liquid changes to solid at a particular temperature
Process	The process is called melting.	The process is called freezing.
Heat	Supplied from external sources	Taken away from the substance
Volume	Increases	Decreases
Internal Energy	Increases	Decreases
Examples	Solid to liquid wax	Water turns ice

What is Melting Point?

Melting point occurs when the substance undergoes a change in its state and turns solid to liquid. The melting point of the crystalline compounds defines pure compounds and elements of the solid. External sources are required to give heat to the solid so that the heat will raise the temperature of the solid and finally turns into liquid.

It is a physical change. It is reversible. During heating, the volume of the substance increases. The Melting point of the crystalline compounds defines pure compounds and elements of the solid. The internal energy of the solid keeps on increasing when the solid gets heated.

A pure substance has a particular temperature at which the substance will attain its melting and freezing point. The impurity in the substance affects its melting and freezing temperature. The molecules move more when the temperature rises.

This is a great idea to use the melting point as an indication to know to how much extent the substance is pure. The external pressure is one of the factors why the substance reaches its melting point. Crystalline compounds have a constant melting point.

The substance can be declared very pure when the substance attains its melting point at just 0.1 degrees celsius. The transition from solid to liquid is so low. An example of a Melting point is solid oxygen has a melting point at -218.4 degrees celsius.

What is Freezing Point?

The Freezing point occurs when the substance undergoes changes and gets converted from liquid to solid. When the heat of the solid is taken away, the heat inside the solid keeps on decreasing, which results in the solid change into a liquid.

When the temperature decreases in the liquid, it starts forming solid. It completely forms solid when it reaches its freezing point. The substance freezes and melts at the same temperature. It is a physical process. It is a reversible process.

The volume of the solid material decreases in this procedure. The internal energy of the solid is affected and decreases. This change occurs in a high state energy state and then moves to lower state energy. The molecules have to move less due to a decrease in their temperature.

In this, the molecules are becoming ordered and taking a fixed shape as the temperature is decreasing. It has less freedom of movement as it is reaching its freezing point. The pressure is increased in the liquid to make it solid. The impurity in the substance minimizes the freezing point. This is a good indication of purity. The purity in the substance can be defined using a freezing point.

Main Differences Between Melting and Freezing Point

Melting point occurs when the substance undergoes a change in its state and turns solid to a liquid, but the Freezing point occurs when the substance undergoes changes and gets converted from liquid to solid.
Atmospheric pressure is a major factor of melting point, but external pressure is a major factor of freezing point.
Melting point occurs when heat is supplied to the solid, whereas the heat is sucked out to reach the Freezing point.
The volume of the solid increases when the solid is reaching the Melting point but the volume of the liquid decreases when the liquid reaches the Freezing point.
The Melting point increases the internal energy, but the Freezing point decreases the internal energy.

Conclusion

Melting point occurs when the substance undergoes a change in its state and turns solid to liquid. Heat is given to the substance as the temperature rises in the solid, it starts melting, and at a temperature, it fully gets converted into the liquid at a particular temperature termed as the melting point.

Crystalline compounds use a melting point to define pure compounds and elements of the solid. When the heat of the solid is taken away, the heat inside the solid keeps on decreasing, which results from the solid change into a liquid.

The volume of the solid gets decreased in this process. The internal energy of the solid is affected and decreases. During heating, the volume of the substance increases. The internal energy of the solid keeps on increasing when the solid gets heated.