chemical reaction
Let an agent reason about a reaction through its equation, conditions, rate, energy and hazards, and never give instructions that make a dangerous reaction easier to perform.
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.
Researched by: Claude
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Equation and stoichiometry What reacts and what forms.
Equation
Reactants and products.
Balanced equation
The balanced equation and states.
- What is the balanced equation, with states of matter? definition
- Which side products or by-products form? definition
Yield
Theoretical and actual yield.
Yield data
The yield obtained and expected.
- What is the theoretical and actual yield? measurement
- What limits the yield? definition
Conditions and kinetics How fast and under what conditions.
Conditions
Temperature, pressure, solvent and catalyst.
Reaction conditions
The conditions used.
- Under what conditions does the reaction proceed? definition
- What catalyst, if any, is involved? definition
Rate
Rate law and activation energy.
Kinetic data
The rate law and parameters.
- What is the rate law, and how was it determined? measurement
- How does the rate change with temperature? measurement
Energy and equilibrium Heat and extent.
Energy change
Enthalpy and heat release.
Thermochemistry
The enthalpy change and heat release rate.
- What is the enthalpy change? measurement
- How fast is heat released, and can it be removed? boundary
Equilibrium
Extent and reversibility.
Equilibrium data
The equilibrium constant and position.
- Is the reaction reversible, and what is its equilibrium constant? measurement
- How can the equilibrium be shifted? definition
Safety Hazards and limits.
Hazards
Runaway, toxic products and incompatibility.
Hazard assessment
The hazards and their controls.
- Which hazards does this reaction present? boundary
- What controls are required at this scale? action
Limits on assistance
What an agent must not help with.
Assistance limits
Requests that must be declined.
- Would giving procedural detail here make harm easier? boundary
- What safe, general information can be given instead? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Activities and processes
- Entry kind
- thing
- Plane
- ACT
- Domain
- ACT.PRC
What it is Filled
A process in which substances, the reactants, are transformed into different substances, the products, by breaking and forming chemical bonds, while elements are conserved.
Why it exists Filled
Let an agent reason about a reaction through its equation, conditions, rate, energy and hazards, and never give instructions that make a dangerous reaction easier to perform.
Distinguishing features Filled
- New substances form, unlike physical changes such as melting
- Atoms are conserved; nuclear reactions are a different category
- Described by a balanced equation with stoichiometry
- Rate and equilibrium are separate questions
What robots and AI may and may not do Derived, awaiting review
Must not
- Let an agent reason about a reaction through its equation, conditions, rate, energy and hazards, and never give instructions that make a dangerous reaction easier to perform.
May
- write and balance its equation
- control it, through temperature, pressure, concentration and catalysts
- measure its rate, yield and energy change
- scale it up, which changes the hazards
Note: Affordances listed as what may be done; prohibitions collected from the text.
Moral aspects Missing, in the backlog
Not described yet. This gap is in the card backlog.
Owners Missing, in the backlog
Not described yet. This gap is in the card backlog.
Links to other meta-models Filled
parent
- Q2281940 - registry parent class
related
- chemical substance - reactants and products are substance models
- chemical equation - the balanced equation is its formal record
- catalyst - catalysts change rate without being consumed
- physical change - no new substance forms in a physical change
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.chemical-reaction
- Wikidata: Q36534 (https://www.wikidata.org/wiki/Q36534)
- Rhea ID: numeric curated biochemical reactions
- RInChI: reaction InChI string standard reaction identifier
Direct properties not applicable Not applicable
- enthalpy of reaction: -several thousand to +several hundred kJ/mol - negative is exothermic
- activation energy: 10-300 kJ/mol - governs how rate depends on temperature
Plane ACT: no invented physical properties.
Recognition optional Filled
- A new substance appears, seen as a precipitate, gas or colour change
- Temperature changes without heating or cooling from outside
- Visible signs are not conclusive; analysis confirms the products
- Signs include colour change, gas bubbles, a precipitate, heat or light, or a change in smell; many reactions show no visible sign.
Capabilities and actions required Filled
- write and balance its equation
- control it, through temperature, pressure, concentration and catalysts
- measure its rate, yield and energy change
- scale it up, which changes the hazards
Hazards and failure modes required Filled
- Runaway exothermic reactions, which cause fires and explosions
- Toxic or flammable products and by-products
- Incompatible reactants mixed by mistake
- Scale-up that changes heat removal and hazards
Standards and interfaces required Filled
- IUPAC recommendations on nomenclature and kinetics
- Process safety regulations such as Seveso III in the EU and OSHA PSM in the US
- GHS labelling for the substances involved
Context of use required Filled
- Making new substances, releasing or storing energy, and explaining change in matter.
- by mechanism: synthesis, decomposition, substitution, redox, acid-base, precipitation, combustion
- by energy: exothermic, endothermic
- by phase: homogeneous, heterogeneous
- by catalysis: catalysed, enzymatic, uncatalysed
Sources Filled
- Wikidata item Q36534: chemical reaction - identity and sense of the item
- Wikipedia: Chemical reaction - general description of the item
Open questions
- Should reaction classes and specific reactions be separate entries?
- How should reaction hazards be represented so agents decline unsafe requests consistently?
- Which identifier should be preferred for reactions?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q36534/spec.json