Question

What is the melting and boiling point of water?

Answer 1

Boiling point:

• It is the temperature at which the vapor pressure of a liquid is equal to the external pressure.
• The temperature at which the water start changes from water (liquid state) to vapors (gaseous state).
• The boiling point of water is $100{}^{\mathrm{o}}\mathrm{C}$.

Melting point:

• It is the temperature at which the solid substance melts and is converted into a liquid phase.
• The temperature at which the water changes from ice to water.
• The melting point of water (ice) is $0{}^{\mathrm{o}}\mathrm{C}$.