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mass fraction

vr.tr.mass-fraction · thing-q899138

Let an agent handle mass fractions by component, mixture, calculation, conversion and uncertainty.

Thing Registry Cross-cutting context XCT.REL
Bundle → Layer → Finding → QuestionsClassifiersWhat it isWhy it existsDistinguishing featuresWhat robots and AI may and may not doMoral aspectsOwnersLinks to other meta-modelsIdentity and identifiersDirect propertiesRecognitionCapabilities and actionsHazards and failure modesStandards and interfacesContext of useSources

Bundle → Layer → Finding → Questions Filled

4 bundles · 8 layers · 8 findings · 16 questions

Definition Which fraction.

Component

What is measured.

Component

Component.

  1. Which component and which mixture? definition
  2. Is it on a wet or dry basis? boundary

Value

Result.

Value

Value.

  1. What is the mass fraction? measurement
  2. How was it measured? provenance
Conversion Other measures.

Mole fraction

Conversion.

Mole

Mole fraction.

  1. What is the equivalent mole fraction? measurement
  2. Which molar masses were used? provenance

Concentration

Mass per volume.

Concentration

Concentration.

  1. What concentration does it correspond to? measurement
  2. Which density was used? provenance
Uncertainty Precision.

Precision

Measurement.

Precision

Precision.

  1. How uncertain is the value? measurement
  2. Which method? provenance

Sums

Consistency.

Sums

Consistency.

  1. Do component fractions sum to one? boundary
  2. How is rounding handled? definition
Applications Uses.

Labels

Product composition.

Labels

Composition labels.

  1. Is the label composition by mass? definition
  2. Does it meet labelling rules? boundary

Thermodynamics

Vapour quality.

Thermo

Vapour quality.

  1. What vapour quality applies in the two-phase region? measurement
  2. How is it computed? definition

Classifiers Filled

Family
Thing Registry
Category
Cross-cutting context
Entry kind
thing
Plane
XCT
Domain
XCT.REL
Other names and narrower kinds
mass fraction of water, vapor quality

What it is Filled

The ratio of the mass of one component to the total mass of a mixture, w = m_i / m_total, a dimensionless quantity often expressed as a percentage by mass; vapour quality is the mass fraction of vapour in a two-phase mixture.

Why it exists Filled

Let an agent handle mass fractions by component, mixture, calculation, conversion and uncertainty.

Distinguishing features Filled

  • Mass of component over total mass
  • Dimensionless
  • Sums to one over all components
  • Differs from mole and volume fraction

What robots and AI may and may not do Filled

Must not

  • Confuse mass fraction with volume or mole fraction in reported compositions.
  • Report a concentration on a label or certificate that was not measured.
  • Round compositions of hazardous or medical mixtures beyond what their use allows.

Only with a human decision

  • Relying on calculated compositions for medicines, food or hazardous mixtures.

May

  • Calculate mass fractions from masses, stating whether results are fractions or percentages.
  • Convert between mass fraction and other composition measures, stating assumptions.

Moral aspects Filled

  • Composition errors in medicines and chemicals can harm patients and workers.
  • Honest labelling of content protects buyers.

Who is affected

  • Patients and consumers
  • Laboratory and plant workers

Owners Filled

Steward

Nobody: a quantity held in common.

Links to other meta-models Filled

parent

  • Q137974504 - registry parent class
  • Q17547084 - registry parent class
  • Q71550700 - registry parent class

related

  • ratio and chemical quantity - category
  • mole fraction and concentration - quantities
  • mass - quantity
  • chemistry and thermodynamics - fields

What else AI and robots need to interact with it Filled

Identity and identifiers required Filled

  • Vercy registry: vr.tr.mass-fraction
  • Wikidata: Q899138 (https://www.wikidata.org/wiki/Q899138)
  • ISO 80000-9 symbol: w quantity symbol

Direct properties not applicable Not applicable

  • range: 0-1 dimensionless - or 0-100 percent

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Symbol w
  • Percent by mass (wt%)
  • Mole fraction and volume fraction are different
  • A number between 0 and 1, or a percentage.

Capabilities and actions required Filled

  • compute mass fractions
  • convert to mole fraction or concentration
  • check label compositions
  • use vapour quality in thermodynamics

Hazards and failure modes required Filled

  • Confusing mass and mole fraction
  • Wet versus dry basis errors
  • Rounding that breaks the sum to one

Standards and interfaces required Filled

  • ISO 80000-9
  • IUPAC Green Book

Context of use required Filled

  • Describing composition in chemistry, materials, food and engineering.
  • mass fraction of solutes
  • moisture content
  • alloy composition
  • vapour quality

Sources Filled

  1. Wikidata item Q899138: mass fraction - identity and sense of the item
  2. Wikipedia: Mass fraction (chemistry) - general description of the item

Open questions

  • Should composition quantities be separate entries?
  • How should conversions be recorded?
  • How should vapour quality be linked?

Machine files

Card as JSON Specification Card backlog vercy.card/1

Provenance

thing registry research (pass 2) · unreviewed

Built from: models/things/publications/thing-q899138/spec.json