Melting Point and Boiling Point

Melting point :-

                 The melting point is the degree of temperature, when a solid metal changes into liquid .

 The melting point of a metal is extremely important from the viewpoint of welding. A metal fusibility is related to its melting point. 

Approximate melting point of metals :

    Metals melt at different temperatures. The table given below gives the melting points of common metales.

Metal	Melting point    ( °C )
Tin	232°C
Lead	327°C
Zinc	419°C
Aluminium	659°C
Bronze	882-915°C
Brass	926-982°C
Silver	960°C
Copper	1083°C
Cast iron	1232°C
Monel metal	1343°C
High carbon steel	1371°C
Medium carbon steel	1426°C
Low carbon steel	1510°C
Stainless steel	1426°C
Nickel	1452°C
Wrought iron	1593°C
Tungsten	3410°C
Gold	1064°C

Boiling point:- 

    The boiling point of a liquid is the temperature at which the vapour  pressure of the liquid becomes equal to the atmospheric pressure of the liquid environment . At this temperature, the liquid is converted into vapour. 

 Approximate Boiling point given below

Element	Boiling point ( °C )
Nitrogen	-195.8°C
Oxygen	-183°C
Carbon dioxide	-78.5°C
Argon	-186°C
Helium	-268.9°C
Water	100°C