唐朝国庆

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Evaporation [蒸发] Liquids evaporate at all temperatures. But heating speeds up evaporation. The hotter a liquid is, the faster it evaporates. The colder a liquid is, the slower it evaporates. Different liquids have different rates[率] of evaporation. Gasoline evaporates faster than water, yet water does not evaporate so slowly as oil. When water and most other liquids are heated, they boil. That is, some of the heated liquid changes to a vapour[蒸汽]. In a container[容器] open to the air, a liquid cannot be heated hotter than its boiling point. If you increase the heat under boiling water, the water boils faster. But the temperature of the water stays the same.