is boiling water a physical or chemical change
Boiling water is a physical change. It is a change of state from liquid to gas but the chemical composition of water remains the same.
Boiling water is a physical change. A physical change refers to a change in a substance that does not involve the formation of a new substance with different chemical properties. When water boils, it changes from a liquid to a gas, but it is still composed of water molecules. The change is reversible, meaning that when the gas cools down, it condenses back into a liquid without changing its chemical composition.
To determine if boiling water is a physical or chemical change, you can follow these steps:
1. Define: Understand what a physical change and a chemical change are.
- A physical change involves a change in the physical state or appearance of a substance without altering its chemical composition.
- A chemical change involves the formation of new substances with different chemical properties.
2. Analyze: Consider the process of boiling water.
- Boiling water involves applying heat to a liquid, causing it to change from a liquid state to a gaseous state.
3. Apply: Determine if the change in the boiling water meets the definition of a physical change or a chemical change.
- In this case, boiling water is a physical change because it involves a change in the physical state of water from a liquid to a gas without altering its chemical composition.
Therefore, boiling water is a physical change.