Question

Define the following term: (a) Melting point (b) Boiling point

Answer 1

(a) Melting Point:

• The temperature at which a solid state change into a liquid state at atmospheric pressure is called the melting point.
• This is the point at which both liquid and solid phase co exists at equilibrium.
• The melting point of the substance also varies with pressure.

(b) Boiling Point :

• It is defined as the temperature at which the vapor pressure of the liquid becomes equal to its atmospheric pressure.
• It is the temperature at which liquid starts to boil.
• The boiling point for any liquid is the temperature point at which the liquid is converted into the gas phase.