Air is made mostly of nitrogen and nitrogen freezes at -185 Celsius.
10 degrees Celsius!
The specific heat capacity of air is approximately 1.005 kilojoules per kilogram degree Celsius.
(1) It takes a while to freeze. (2) The earth may be warmer than the air above it.
A pond community can be warm with fresh air and a temperature of about 30 degree Celsius to 37 degree Celsius.
The amount of energy required to raise the temperature of air by 1 degree Celsius depends on various factors such as the volume of air and its specific heat capacity. As a rough estimate, it takes about 1.005 kJ of energy to raise the temperature of 1 cubic meter of air by 1 degree Celsius.
It all depends on the temperature of the air that it is in contact with, the air has to be at least 0 degrees Celsius so you cannot work out how quickly it will freeze without knowing the air temperature ;)
Blow air into it!
The increase in the velocity of sound in air for a 1-degree Celsius rise in temperature is approximately 0.6 m/s. This increase occurs because the speed of sound in air is directly proportional to the square root of the temperature.
Water freezes in mid-air at a temperature of 32 degrees Fahrenheit or 0 degrees Celsius.
The coefficient of thermal expansion of air is approximately 0.00367 per degree Celsius.
Ice is frozen liquid, mainly water. Water freezes at 0 degrees Celsius or 33 degrees Fahrenheit. Other liquids freeze at different temperatures.
All matter is densest and heaviest at precisely absolute zero, which is -273.15 degrees Celsius.