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When a substance reaches the boiling point what physical change usually takes place?
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Liquid to gas
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Gas to liquid
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Solid to gas
That's Correct!
It's Wrong!
When a substance reaches the boiling point, it undergoes a physical change known as vaporization or boiling. This change involves the conversion of a liquid into its gaseous state. As heat is applied, the molecules within the liquid gain enough energy to overcome the intermolecular forces holding them together, causing them to break free and form a gas. This process is characterized by the formation of bubbles and the release of gas molecules into the surrounding environment. Therefore, the correct answer is "liquid to gas".