Pure water freezes at 0 degrees Celsius (32 degrees Fahrenheit)
. However, water can sometimes supercool to temperatures lower than 0°C
. Factors affecting the freezing point of water:
- Impurities The freezing point of water is affected by impurities in everyday water
- Pressure The temperatures at which water freezes can change depending on pressure
- Supercooling Pure liquid water can supercool to temperatures below its melting point of 0°C
. When liquid water is cooled below -42 degrees F, it crystallizes into ice too quickly for scientists to measure the temperature of the liquid
- Elevation At the summit of Mount Everest, water boils at a lower temperature, 154 F (68 C)
