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It's because substances have different boiling point and freezing point. By finding the exact boiling point and freezing point, you can identify a substance.

Keep in mind that a material's melting point is the same as its freezing point. These are just different terms for the same thing, it just depends on whether energy is being removed from a substance (freezing) or if energy is being added to a substance (melting). The same thing also applies to the boiling/condensation point.

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16y ago
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9y ago

The temperature point to which you refer is known as the 'triple point' of water. This is at 273.16 K, or .01 deg Celsius. Other liquids and gases also have a triple point. In the case of water, this is the temperature at which its three phases; solid, liquid, and gas; may co-exist. The triple point of water is only one of a number of temperatures that are used to produce a wide and useful series of temperature scales.

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9y ago

Many substances have different melting and boiling points, thus one can use their melting and boiling points to identify them.

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11y ago

because it freezes

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Q: Explain why the boiling point and the melting point can be used to help identify substances-?
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Related questions

How can the boiling and the melting point be used to help identify substances?

intermolecular forces are hard to overcome...apex


How could the identify of a compound be established by melting point?

Pure substances have very specific melting (and boiling) points. Assuming the substance is pure you could measure the melting point and compare it to a known database of melting points.


How do you identify solids at melting or boiling points?

Melting and boiling points are different for each compound or element.


What Five characteristics or properties used to identify substances are?

Flexibility, Smell, Odor, Boiling Point, Melting Point, Texture, Color (there's seven for you)


How can the melting and boiling point help you identify it?

Each pure substance has its own unique melting and boiling point.


Do pure substances have a fixed boiling and melting point?

yes they have


Why can the boiling point and the melting point be used to help identify a substance?

The boiling and melting points are almost unique to individual substances. If it should happen that two possible substances have the same melting point, they can still be identified by the method of mixed melting points. If substances A and B have the same melting point and you mix them, the mixture will melt belowthe tabulated temperature. Thus if you mix your unknown with a sample of what you think it is, if you are right it will still melt sharply at the expected temperature, but if you are wrong it will melt gradually and at a lower temperature.


How is the melting point of asolid and boiling point of a liquidaffected when impurities are added to the substances?

Adding impurities lowers the melting point and raises the boiling point.


Explain why the boiling point and the melting point can be used to help identify substances?

100 degrees mate. 100 degrees Celsius is the boiling point for pure water at 1atm or sea level. The boiling point is useful in identifying chemical compounds. Chemical compounds have different boiling points that are specific to it' s chemical composition. If you know what the boiling point or melting point is you can also tell if your compound is pure, as any impurities will change these.


What are the characteristic of pure substances?

The characteristics of pure substances are:fixed melting pointfixed boiling pointsfixed valencyfixed densitystability


What property can be used to identify metal?

Specific heat, density, and melting/boiling point.


Properties to identify substances are usually those that are what?

There are Physical Properties: Color, Density, Viscosity, Hardness, Lustre, Crystal Shape, Ductility, Cleavage, Solubility, Maleability, Boiling Point, Melting Point, and Conductivity!