水蒸气,是水(H2O)的气体形式。当水达到沸点时,水就变成水蒸气。在海平面一标准大气压下,水的沸点为99.974°C或212°F或373.15°K。当水在沸点以下时,水也可以缓慢地蒸发成水蒸气。而在极低压环境下(小于0.006大气压),冰会直接升华变水蒸气。水蒸气可能会造成温室效应,是一种温室气体。
水蒸气 water vapor ; steam ; vapor ; vapour
水蒸气蒸馏 steam distillation ; Hydrodistillation ; Water-steam distillation ; wet distillation
水蒸气计 atmidometer ; atmometer
饱和水蒸气压 Saturation Vapor Pressure ; Saturated water vapor pressure ; Saturation water vapour pressure ; body temperature pressure saturated
水蒸气蒸馏法 Steam distillation ; Steam distillation method ; technology of wet distillation ; Distillation method of water vapour
水蒸气透过率 WVTR ; WVP ; MVTR
水蒸气保护电弧焊 water vapour arc welding
开管水蒸气氧化 open tube steam oxidation
水蒸气转化 steam reforming
水蒸气的流入 inflow of water vapour ; IOWV
云是由大气中的水蒸气凝结成的。
A cloud is a condensation of water vapour in the atmosphere.
水蒸气凝成了小水滴。
然后就会下雪,因为当空气上升时,它就会冷却并失去保持水蒸气的能力。
Then it snows because as the air rises, it cools off and loses its capacity to hold water vapor.
There's the water phase, there's the ice cube is the solid phase, and there's some water, gas, vapor, and that's one bar.
里面放一块冰,这是固态;,于是我们得到了水,冰和水蒸气三态共存的点。
And, even Cavendish, one of the things that he observed was that hydrogen could be combusted to produce water vapor.
甚至卡文迪许都观察到了,氢气燃烧,会产生水蒸气。
The partial pressure of the water, of gaseous water above that equilibrium of ice and water is not one bar, it's much less.
哪里错了吗?,问题在于,冰水混合物上方的,大气中水蒸气的分压,不是一个大气压。
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