Will there be a gas phase in the sealed container during the heating from 20°C to 90°C?
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At one atmosphere pressure, water is filled into a container with a sealed top that can move up and down, and heating begins. Will there be a gas phase in this container during the heating from 20°C to 90°C? Or in other words, during the range of 20°C to 90°C, the saturated vapor pressure of water is definitely lower than atmospheric pressure; so isn’t it impossible for gaseous water vapor to exist?
There will be no gas phase; water can evaporate in the air because water vapor can dissolve in it.
There will be no gas phase, provided the sealed bottle is filled with liquid. However, an absolute technical vacuum cannot be achieved.