#liquefaction  the conversion of a solid or a gas into a liquid
  supertype:  phase_change__phasechange__phase_transition__phasetransition__state_change__statechange__physical_change  a change from one state (solid or liquid or gas) to another without a change in chemical composition
  subtype:  dissolving__dissolution  the process of going into solution; "the dissolving of salt in water"

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