Frost
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Water vapour changing to solid on a surface is sublimation of the vapour. For water the product is referred to as rime or hoarfrost.
When water vapor condenses on a surface that is below zero degrees Celsius, it forms a solid directly without passing through the liquid phase. This process is called deposition, and the solid formed is usually frost or ice.
-90 degrees Celsius is below the freezing point of water, so yes, at that temperature water would be frozen and in a solid state.
Water vapor that condenses on a surface with a temperature below 0 degrees Celsius will freeze and form ice. This process is known as deposition, where water vapor changes directly into a solid state without going through the liquid phase.
Yes, condensation can occur on cold surfaces when the temperature of the surface is below the dew point temperature of the surrounding air. This causes the water vapor in the air to lose energy and condense into liquid water on the cold surface.