freezing
Let an agent explain freezing as a physical process, relay freezing points, latent heat and nucleation from references, describe applications in food, biology and materials, and distinguish freezing from other cooling and solidification processes.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain freezing as a physical process, relay freezing points, latent heat and nucleation from references, describe applications in food, biology and materials, and distinguish freezing from other cooling and solidification processes.
The phase transition of a liquid to a solid when its temperature falls below the freezing point, releasing latent heat, as in water turning to ice, and by extension the process of cooling materials to preserve them, including flash freezing of food for small ice crystals and splat quenching of molten metal to form metallic glasses; freezing governs weather, cryopreservation, food technology and materials science, and supercooling can delay it below the nominal freezing point.
What it is for: Solidifying liquids and preserving materials by cold.
It can be explain the process; relay physical data; describe applications; distinguish from related processes.
Distinguishing features
First-order phase transition
Latent heat release
Nucleation and supercooling
Expansion of water on freezing
What it looks like
Liquid turning to solid, as water to ice.
Physical character
freezing point of water: 0 degrees C - at 1 atm
latent heat of fusion of water: 334 kJ/kg
splat quenching rate: up to about 1 million K/s
How it is recognised
Liquid to solid phase transition
Water freezing, flash freezing, splat quenching, cryopreservation
Refrigeration cools without necessarily freezing; solidification from a melt in casting is related; frostbite is the injury
Related models
is a kind of - in registry terms
is a kind of - in registry terms, in its applied sense
is the reverse of - the solid to liquid transition
occurs at - for a given substance and pressure
In practice
Families and kinds
freezing of water and ice formation
freezing of food, including flash freezing
cryopreservation of cells and tissues
rapid solidification such as splat quenching
freezing of soils and permafrost
freeze-drying as a related process
Standards and regulation
Food safety rules for frozen food
Standards for cryopreservation in medicine
Building codes for frost protection
Failure modes and hazards
Frost damage to pipes, crops and structures
Ice crystal damage in cells and food
Frostbite and hypothermia
Confusing freezing with chilling
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What freezing is.
Science.
Definition
Definition and physics.
Definition
Definition.
- What happens physically when a liquid freezes, and what are latent heat and nucleation? definition
- Is the process freezing, chilling, casting or freeze-drying? boundary
Water
Water and ice.
Water
Water.
- Why does water expand on freezing, and what is supercooling? definition
- Which entry fits ice? action
Apply Applications.
Application.
Food
Food freezing.
Food
Food.
- How does flash freezing preserve food quality, and what safety rules apply? provenance
- Which references are standard? provenance
Biology
Cryopreservation.
Biology
Biology.
- How are cells, embryos and tissues frozen and thawed safely? provenance
- Which entry fits cryopreservation? action
Materials Materials and environment.
Science.
Materials
Rapid solidification.
Materials
Materials.
- How does splat quenching produce metallic glasses and other structures? provenance
- Which sources are cited? provenance
Environment
Freezing in nature.
Environment
Environment.
- How does freezing shape weather, soils, permafrost and living organisms? provenance
- Which entry fits permafrost? action
Context Safety and history.
Context.
Safety
Frost and cold hazards.
Safety
Safety.
- How are frost damage and cold injuries prevented? provenance
- Is the user describing a cold injury, which needs medical care? boundary
History
History.
History
History.
- How did the science and technology of freezing develop, from ice houses to Birdseye and cryogenics? provenance
- Which entry fits the history of refrigeration? action
What the second pass must settle
- Should flash freezing and cryopreservation be separate entries?
- How should physical data be linked?
- The registry entry has merged aliases naming specialised techniques; should they be split off?