The most obvious answer is that the vapor will condense rapidly, even possibly before your eyes. By condense, I mean that the vapor will quickly turn into a liquid state.
It will then freeze into a solid state (ice).
super-cooled liquid
Yes, water can be cooled below its freezing point without freezing immediately. This is known as supercooling. When the water is disturbed or a seed crystal is introduced, it will quickly freeze.
supercooled
Heat moves from the water to its surroundings when water is cooled below 0 degrees Celsius. This causes the temperature of the water to decrease further until it reaches its freezing point, at which point it will freeze into ice.
When a liquid is cooled to its freezing point, it changes state from a liquid to a solid. The molecules within the liquid slow down and lose energy, causing them to form a more organized structure with a fixed shape and volume. This process is known as solidification.
it freezes
By freezing so if it got froze it would no longer be a liquid. the answer alltogether though is : A LIQUID CHANGES ITS STATE BY FREEZING.
Water that stays liquid at temperatures below freezing is called supercooled water. This phenomenon occurs when the water is kept in a very pure state and is cooled slowly below its freezing point without forming ice crystals.
Water is said to be supercooled when it remains in a liquid state even though it has cooled below its freezing point of 0°C. This occurs because there are no impurities or nucleation sites present to initiate the freezing process. Supercooled water will freeze instantly upon disturbance or when a nucleation site is introduced.
I know it sounds a little stupid, but supercooling is when water remains a liquid while it is below freezing point. Note, only some waters can do this.
When a bottle of water is opened, the pressure inside the bottle decreases, causing the water to start freezing because of the drop in temperature. This phenomenon is known as "flash freezing" and occurs rapidly when the conditions are right, such as in very cold temperatures.
Bromine is a liquid at room temperature. Cooled below its freezing point, bromine would probably be a brittle crystalline solid much like iodine.