carbon dioxide
Let an agent explain carbon dioxide and its properties, relay its roles in the carbon cycle, atmosphere and climate from scientific sources with attribution, describe industrial uses and hazards, and distinguish carbon dioxide from carbon monoxide, carbonic acid and carbonates.
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 carbon dioxide and its properties, relay its roles in the carbon cycle, atmosphere and climate from scientific sources with attribution, describe industrial uses and hazards, and distinguish carbon dioxide from carbon monoxide, carbonic acid and carbonates.
A chemical compound of one carbon and two oxygen atoms, a colourless gas at ambient conditions that is a trace but critical component of Earth s atmosphere, produced by respiration, combustion and volcanism and consumed by photosynthesis, existing also as liquid and solid dry ice, as supercritical carbon dioxide used as a solvent, and as exotic forms such as amorphous carbonia, with isotopically labelled forms such as carbon-13 dioxide used in research; its rising atmospheric concentration from fossil fuel burning is the main driver of climate change.
What it is for: Industrial uses; a natural atmospheric gas.
It can be explain properties and forms; relay atmospheric and climate roles; describe uses and hazards; distinguish related compounds.
Distinguishing features
Greenhouse gas
Carbon cycle hub
Sublimes as dry ice
Supercritical solvent
What it looks like
An invisible gas; solid as white dry ice.
Physical character
atmospheric concentration: about 420 ppm - mid-2020s, rising
pre-industrial concentration: about 280 ppm
sublimation point: -78.5 C - at 1 atm
critical point: 31.0 C and 73.8 bar note
How it is recognised
Carbon dioxide gas, liquid, solid and supercritical
Atmospheric CO2, dry ice, supercritical CO2, amorphous carbonia, carbon-13 dioxide
Carbon monoxide is toxic CO; carbonic acid is the dissolved form; carbonates are salts
Related models
is a kind of - in registry terms
is a kind of - in registry terms
drives - as the main greenhouse gas
is consumed by - in plants
In practice
Families and kinds
atmospheric carbon dioxide
liquid and solid carbon dioxide including dry ice
supercritical carbon dioxide
exotic phases such as amorphous carbonia
isotopically labelled carbon dioxide such as carbon-13 and oxygen-17 forms
dissolved carbon dioxide and carbonic acid
Identifiers
CAS 124-38-9 carbon dioxide
E number E290 food additive
ChEBI CHEBI:16526 carbon dioxide
Standards and regulation
Climate agreements such as the Paris Agreement and emissions trading rules
Occupational exposure limits
Food and beverage gas standards
Carbon capture and storage regulations
Failure modes and hazards
Asphyxiation in confined spaces
Confusing with carbon monoxide
Climate misinformation, to be countered with attributed science
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 carbon dioxide is.
Science.
Properties
Properties and forms.
Properties
Properties.
- What are the properties of carbon dioxide, and what are dry ice, supercritical CO2 and amorphous carbonia? definition
- Is the question about carbon dioxide, carbon monoxide, carbonic acid or carbonates? boundary
Cycle
Carbon cycle.
Cycle
Cycle.
- How does carbon dioxide move through respiration, photosynthesis, oceans and rocks? definition
- Which entry fits carbon cycle? action
Climate Atmosphere and climate.
Attribution.
Greenhouse
Greenhouse effect.
Greenhouse
Greenhouse.
- How does carbon dioxide warm the planet, and what do IPCC assessments conclude? provenance
- Which references are standard? provenance
Trends
Trends and policy.
Trends
Trends.
- How have concentrations changed, and what policies address emissions, with positions attributed? provenance
- Is the presentation evidence-based and neutral on policy? boundary
Use Uses and hazards.
Application.
Uses
Uses.
Uses
Uses.
- How is carbon dioxide used in beverages, fire suppression, refrigeration, supercritical extraction and enhanced oil recovery? provenance
- Which sources are cited? provenance
Hazards
Hazards.
Hazards
Hazards.
- What are the asphyxiation and other hazards of carbon dioxide, and how are they managed? provenance
- Which entry fits carbon dioxide poisoning? action
Context Capture and history.
Context.
Capture
Capture and removal.
Capture
Capture.
- How do carbon capture, storage and removal technologies work, and what debates surround them, with positions attributed? provenance
- Which entry fits carbon capture and storage? action
History
History.
History
History.
- How was carbon dioxide discovered by van Helmont and Black, and how was its climate role established? provenance
- Which entry fits the history of climate science? action
What the second pass must settle
- Should atmospheric carbon dioxide and dry ice be separate primary entries?
- How should climate and chemistry sources be linked?
- The registry entry has merged aliases naming phases and labelled forms; should they be split off?