Information AboutFreezing |
| CATEGORIES ABOUT FREEZING | |
| phase changes | |
| atmospheric thermodynamics | |
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Cryogenic temperatures can cause a substance to freeze below its melting point, a process known as Flash Freezing . For some pure substances, such as Water , the freezing temperature is lower than the melting temperature. The freezing point for water is only the same temperature as the Melting Point when Nucleators are present to prevent Supercooling . The melting point of water is 0°C (32°F, 273 K). In the absence of nucleators water will supercool to −42°C (−43.6°F, 231 K) before freezing. But in the presence of nucleating substances the freezing point of water is the same as the melting point. Nucleating agents are commonly present in the environment, which is why Rain water and Tap Water will normally freeze at the melting point of water. Freezing is a common method of Food Preservation which slows both food decay and the growth of Micro-organism s and, by turning Water to Ice , makes it unavailable for Bacteria l growth and Chemical Reaction s (see Frozen Food ). SEE ALSO |
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