Question

Define:

1. Melting point, and
2. Boiling point.

Answer 1

Melting point:

1. At atmospheric pressure, the temperature at which solid transitions from solid to liquid is the melting point of a liquid.
2. At this point, both the liquid and solid phases are in equilibrium.
3. Example: Melting point of iron is $1538°\mathrm{C}$.

Boiling point:

1. The boiling point of a liquid is the temperature at which the vapor pressure of the liquid equals the atmospheric pressure of the liquid's environment.
2. The liquid gets transformed into vapor at its boiling point.
3. Example: Boiling point of iron is $2862°\mathrm{C}$.