Question

When water is heated, we see bubbles rising up. Why?

Answer 1

Hint: To answer this question, we must have a concept of states of water, i.e., solid state, liquid state and gaseous states of water. There is a lot of air dissolved in the water. This is what permits fish and other aquatic creatures to breathe. When the temperature is raised, the solubility of gases drops, which is why dissolved air bubbles out of the water.

Complete answer:
Boiling water causes a physical change rather than a chemical reaction.Molecules of the water do not break into hydrogen and oxygen. Instead, the links between water molecules break, allowing the substance to transition from a liquid to a gas.

When water is boiled, the heat energy is transferred to the water molecules, causing them to travel faster. The molecules eventually have too much energy to remain united as a liquid.When this happens, they produce gaseous water vapour molecules, which float to the surface as bubbles and travel through the air.

Note: Water exists in three states: solid, liquid, and gas, as you surely already know. Ice is the solid form of water. Water, of course, is the liquid form. Water vapour is the gaseous form. Water vapour is almost always present in the air around us. It's simply that we can't see it. Also note that the boiling point of water varies with the altitude or atmospheric pressure and different types of chemicals present on it.