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How can one determine the melting point of a compound?

To determine the melting point of a compound, one can use a melting point apparatus. The compound is heated gradually until it changes from a solid to a liquid state. The temperature at which this change occurs is recorded as the melting point of the compound.


Why is it misleading to identify a solid compound just from a lone melting determination?

Identifying a compound based solely on its melting point is misleading because different compounds can have the same melting point. Additional tests, such as spectroscopic analysis or chromatography, are required to accurately determine the compound's identity. A single melting point determination is not sufficient as it could lead to a wrong conclusion about the compound present.


What physical change of a solid to a liquid at the melting point?

At the melting point, a solid absorbs heat energy and its particles gain enough energy to overcome the forces holding them in a fixed position. This results in the solid changing to a liquid state. The temperature remains constant during this phase change until all the solid has melted.


For what two purposes are melting points routinely used?

- melting point is a specific characteristic of a substance; consequently we can distinguish these substances knowing the melting point - the knowledge of the melting point is absolutely necessary to design technological processes, to made alloy, to use surely materials at high temperature, etc.


An unknown compound gave a melting point of 230 Cwhen the liquid solidifiedthe melting point was redetermined and found to be 131Cwhat might have caused this change?

Pressure can affect melting points.However, assuming that your conditions are the same, you may have changed the crystal structure of your compound.The crystal structure of a compound can affect its melting point. For example, diamond and graphite are both forms of elemental carbon. Diamond is a face-centered cubic structure. Graphite, however, is hexagonal. Graphite has a melting point of 3652°C, whereas diamond melts at 3550°C. When you liquified your compound, it because amorphous and lost its crystal structure. It may have recrystallized into a different structure.Heating may also have effected a chemical change. If you saw bubbles or a color change, you likely made a new compound.

Related Questions

How is the melting of an impure compound expected to change with recrystallization?

During recrystallization, impurities are removed as the compound is dissolved and then slowly cooled to allow for the formation of pure crystals. As a result, the melting point of the compound should increase after recrystallization because the presence of impurities lowers the melting point of the compound.


How can one determine the melting point of a compound?

To determine the melting point of a compound, one can use a melting point apparatus. The compound is heated gradually until it changes from a solid to a liquid state. The temperature at which this change occurs is recorded as the melting point of the compound.


What is recrystallization?

Recrystallization is a process in which rocks actually change. It is whereby the crystals of one mineral slowly convert to few but larger crystals of the same mineral with out melting the rock. It is them followed the the process of neomorphism then metasomatism.2.Crystallization is the (natural or artificial) process of formation of solid crystals from a homogeneous solution or melt, or more rarely directly from a gas. This process is often used as a technique to separate a solute from a liquid solution, bringing it into a pure crystalline phase.


Is a melting point a chemical change?

A melting point is a physical property. It yields much information in the identification of a compound


Why is it misleading to identify a solid compound just from a lone melting determination?

Identifying a compound based solely on its melting point is misleading because different compounds can have the same melting point. Additional tests, such as spectroscopic analysis or chromatography, are required to accurately determine the compound's identity. A single melting point determination is not sufficient as it could lead to a wrong conclusion about the compound present.


How do you find a compounds melting point?

One common method to determine a compound's melting point is by using a Melting Point Apparatus, which gradually heats the compound until it changes from a solid to a liquid state. The temperature at which this phase change occurs is recorded as the melting point. It is important to conduct multiple trials to ensure accuracy.


Why is melting a physical property of the wax but flammability in a chemical property?

Melting doesn't change the composition of a compound (substance).Burning is a chemical reaction, an oxidation - new compounds are formed.


What causes rocks to change from one type to another type?

Rock is continually recycled into new forms of rock by the processes of weathering, erosion and lithification, melting and solidification, or by pressure and/or heat causing recrystallization and changes in mineralization.


Is melting physical or a chemical change?

it is a physical changeIce melting is a physical change. Anything changing from a solid to a liquid (or liquid to solid), or from a liquid to gas (or gas to liquid) is a physical change).See the Related Questions for more information.physical change is anything changing from a solid to a liquid


What physical change of a solid to a liquid at the melting point?

At the melting point, a solid absorbs heat energy and its particles gain enough energy to overcome the forces holding them in a fixed position. This results in the solid changing to a liquid state. The temperature remains constant during this phase change until all the solid has melted.


What is the change of state does melting have?

Melting is the change from a solid to a liquid.


Is a melting popsicle a chemical change?

Melting is a physical change.