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When heat is added to the water, the molecules move faster. When the water reaches the boiling point (100 Degree Celsius), the water molecules at the surface of the water would break apart with the other molecules and escape (evaporate). When they evaporate, the water molecules changes state and becomes water vapour.
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoFirst the hydrogen bonds between the water molecules are broken. Then if enough heat is applied the water will boil, causing the water to change from a liquid to a gas.
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