Question

Define melting point.

Answer 1

Hint: When the heat is given to the solid its temperature will increase till the melting point is not reached. After that when more heat will be applied then the solid state of the substance will be converted to the liquid state of the substance with no temperature change.

Complete Step by step answer:
In crystalline solids the melting point is a characteristic figure and its one application is to identify pure elements and compounds. The solids which melt above a range of temperature are amorphous solids. The melting point of solid is considered to be the freezing point of liquids. The reason behind it is that the liquid freezes in different crystal systems and the impurities lower the freezing point. So the actual freezing point is not the same as that of the melting point of that substance. It is also the term used in phases
Different melting points different substances are as follows-

Compound	Melting point
Aluminium	\[{{660.3}^{o}}C\]
Aluminium bromide	\[{{97.5}^{o}}C\]
Aluminium chloride	\[{{192.6}^{o}}C\]
Aluminium phosphate	Greater than \[{{1460}^{o}}C\]
Ammonium	\[-{{77.65}^{o}}C\]
Aluminium iodide	\[{{188.28}^{o}}C\]
Aluminium oxide	\[{{2053}^{o}}C\]

The other side of melting point is boiling point, boiling point is the temperature at which the pressure which is exerted by the surrounding upon a liquid is equaled by the pressure exerted by the vapour of the liquid.

Note: Students generally forget the melting point of common compounds. Students should learn the definition of melting point and understand the relationship between freezing point m, melting point and boiling point. The freezing point of water is \[{{0}^{o}}C\].