Cooling a mixture of water vapor and air to temperatures below 273 K can lead to complex phase equilibria. At temperatures above 273 K, water typically exists in gaseous and liquid states simultaneously, but below this threshold, solid water (ice) can also form. The saturation pressure of water vapor remains above zero, indicating that some vapor can coexist with solid ice. This suggests that a gas/solid equilibrium is possible, allowing for the presence of both phases in the mixture. Understanding these dynamics is crucial for applications in meteorology and climate science.
