Physical Transformation AtlasPTA
Phenomenon · phenomenon:diffusion

Diffusion

Species move down a concentration gradient by random motion; free energy of mixing is dissipated unless a membrane or electrode intercepts it.

Thermodynamicsfirst reported 1855

Atlas record: 2 claims reference this phenomenon — 2 established.

Explorerelations · sources · cite

2claims0enumerated routes0routes with complete-composition evidence0candidate routes not searched1cited sources

Relations

drives · 1
Concentration gradient—drives→Diffusionestablished
dissipates to · 1
Diffusion—dissipates to→Useful heatestablished
  • free mixing without a membrane dissipates the whole free energy as heat

Cited sources · 1

  1. [1]
    S. R. de Groot, P. Mazur. Non-Equilibrium Thermodynamics (1962)
    North-Holland · book, no DOI · record

Cite this entity

Physical Transformation Atlas (2026). entity phenomenon:diffusion: Diffusion. Dataset revision rbfbfcbb70e57 (hash of the canonical data). https://physical-transformation-atlas.wldud5192.workers.dev/phenomenon/diffusion

Ids and matrix addresses are stable across revisions; the revision hash identifies the exact canonical files the record was compiled from and is meta.data_hash in every /api export. Reuse terms: see the license field in any export.