If the temperature of the water were 0°C and the pressure was above 760 mm Hg, what phase would the water be in?
Question
If the temperature of the water were 0°C and the pressure was above 760 mm Hg, what phase would the water be in?
Solution
The phase of water at 0°C and a pressure above 760 mm Hg would be solid. This is because the increased pressure would cause the water to freeze, even at this temperature which is typically the freezing/melting point under standard atmospheric pressure (760 mm Hg). This is due to the phase diagram of water, where increasing pressure while at a temperature below the typical freezing point results in a phase change to solid (ice).
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