What is the melting point? & Life applications on the melting process
The melting point
The matter exists in three states which are solid, liquid and gas, and the matter can change from one state to another by heating, The change of matter from the solid-state to the liquid state is known as melting and the temperature at which the matter begins to melt is called the melting point.
Each substance has a definite melting point which is used to differentiate between different substances, Different solids have different melting points, where some solid substances have low melting points such as wax, butter & ice.
Some solid substances have high melting points such as iron, copper, aluminum and table salt, The melting point of a substance depends on the pressure and it is usually specified at standard pressure.
Life applications on the melting process
Copper-gold alloy is an alloy used in making of jewels which used for decoration, and nickel-chrome alloy is an alloy used in making of heating coils, The materials with high melting points are valuable for making the products which need to resist high heat.
Tungsten has an extremely high melting point, and it is used in the filaments for the light bulbs, If you have a mixture of several solid substances, melting is a way by which some substances (with lower melting points) can be separated from others (with higher melting points).