Question

What are melting points and boiling points?

Answer 1

Melting point

• Melting point is the temperature at which the solid state of a substance changes into a liquid state at atmospheric pressure.
• A Solid's melting point indicates the strength of the force of attraction between its particles.

Example of melting point

• The melting point of ice is $273.15\text{K}$.

Boiling point

• The constant temperature at which a liquid starts changing into gas (vapour) is called boiling point.
• Boiling is a bulk phenomenon.

Example of boiling point

• Water starts boiling at temperature${100}^{\circ }\text{C}$. Hence, boiling point water is ${100}^{\circ }\text{C}$.