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Water in a truck's radiator can get hotter than 100 °C when the radiator is sealed tightly. How is it possible for water to exist as a liquid at temperatures above its normal boiling point?

User DNKROZ
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Water can exist as a liquid at temperatures above its normal boiling point if the pressure on the surface of the water is increased or if it contains dissolved substances that elevate its boiling point.
User Gene Reddick
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