What happens to dissolved gases in water when it is boiled?

When water is boiled, the dissolved gases in the water undergo a specific change. Let's break down what happens in detail:

Dissolved gases separation:
- When water is heated and reaches its boiling point, the kinetic energy of the water molecules increases.
- This increased kinetic energy causes the water molecules to move faster and farther apart, which leads to the breaking of the hydrogen bonds that hold the water molecules together.
- As the water molecules move apart, the dissolved gases that were previously in solution are released from the water.
- These gases, such as oxygen and carbon dioxide, have lower solubility at higher temperatures and are less likely to remain dissolved in the water when it is boiling.

Physical change:
- The separation of dissolved gases from water during boiling is a physical change, as the chemical composition of the gases and water remains the same.
- The gases simply move from a dissolved state in the water to a gaseous state above the boiling water.

Visual observation:
- You may notice bubbles forming and rising to the surface of the boiling water. These bubbles are composed of the dissolved gases that are being released as the water boils.
- This visual observation further confirms that the dissolved gases are separating from the water during the boiling process.

In conclusion, when water is boiled, the dissolved gases in the water separate from the liquid and are released into the atmosphere as bubbles. This process is a result of the increased temperature and kinetic energy of the water molecules, causing the gases to become less soluble and escape from the water.