Boiling Points

The physical properties of a liquid behave under different conditions. They are the temperatures and pressures. It also shows how it behaves when it comes into contact with other substances. Some liquids, when they are heated, will boil and evaporate at low temperature. On the other hand, other liquids boil at extremely high temperatures.

The state where liquids boil and change from the liquid state into steam or gas is called boiling point. The boiling point of a liquid is the temperature at which molecules escape from the liquid and enter the gaseous state in the atmosphere. As the molecules gain more energy, they move more quickly and range further from each other. When they are far enough apart, intermolecular forces become very weak to pull them back together. Consequently, the molecules form a vapour. Boiling starts when bubbles of vapour form within the liquid. The bubbles rise to the top of the liquid and release the gaseous molecules to the atmosphere above the liquid’s surface.

Different matters have different reading boiling points. This is because the force of attraction between their molecules is also different. For instance, water molecules are strongly attached to each other because of their structure. One water molecule consists of one oxygen atom and two hydrogen atoms. Here, the oxygen atom attracts electrons it shares with the hydrogen atoms more strongly than the two hydrogen atoms do.