At absolute zero, which is -273.15°C or 0 Kelvin, water undergoes a phase transition. In theory, at this temperature, all molecular motion would cease, and water would freeze into a solid state. However, achieving absolute zero is practically impossible due to the laws of thermodynamics.
In reality, as water approaches absolute zero, it would first freeze into ice. The molecules would slow down significantly, and the water would lose its liquid properties. The ice formed at such low temperatures would be extremely brittle and would lack the usual crystalline structure seen in ice at higher temperatures.
It’s important to note that absolute zero is a theoretical concept. In practical terms, scientists have come very close to reaching absolute zero but have never actually achieved it. Therefore, while we can predict what would happen to water at absolute zero based on our understanding of physics, we cannot observe it directly.