Question
Is boiling water a chemical change or a physical change and why?
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GPT-4o mini
Boiling water is considered a physical change. This is because, during boiling, water undergoes a phase transition from a liquid to a gas (steam) when it reaches its boiling point, but its chemical composition (H₂O) does not change.
In a physical change, the form of the substance changes, but its chemical identity remains the same. In the case of boiling water, the molecules of water are still H₂O, whether they are in liquid form or as water vapor. The change is reversible—when the water vapor cools, it condenses back into liquid water. Therefore, boiling water is classified as a physical change.
In a physical change, the form of the substance changes, but its chemical identity remains the same. In the case of boiling water, the molecules of water are still H₂O, whether they are in liquid form or as water vapor. The change is reversible—when the water vapor cools, it condenses back into liquid water. Therefore, boiling water is classified as a physical change.
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